1、53-(47-38)=2751-10+2=5252-(16-8)=2345678910111213141516171819202122232425練習(xí)題一2 / 206-(3-1)=43 . 42-26+45=68 .20-(19+1)=44 . 50+11-11=6950-(6-2)=45 . 42-(26-14)=7029+68-77=46 .80-68+2=71 .76-(25-23)=47 . 66+2-18=7241-37+37=48 .25+61-20=73 .84+1-56=49 .58-34+13=74 .58-32+10=50 .97-(4-1)=53 .3-(2+1)=32

2、-(7+12)=18-(2+12)=.43-(42-5)=23-(4+1)=66-29+33=79+14-15=3-(2+1)=67-43+32=77-(63-37)=94-(62+23)=65-(54-50)=66-(28+26)=32+8-24=25-(7-6)= 91-(86-71)= .46-(7-5)=82+17-17=38+59-48=59-(51-44)=55-(13+34)=29-(25+2)=53-32+31=30-(22-11)=2813-(2+6)=29.52-(51-47)=305+1-2=3144-(16+14)=3285-72+4=33.11-(4-3)=34.53

3、-38+11=35.44-(16-8)=36.4+87-48=37.76-(69-55)=3841-67+55=39.27-(18+2)=404-(1+2)=41.7-2+35=42.27-(3+22)= 28-24+23=54.31-(7+2)=5519+35-3=56.43-18+12=5783-(23+51)=5835+33-43=59.5+68-38=60.21+37-3=61.76-(64-11)=6274+12-26=6375-(46+24)=64.60-(24-6)=657-(1-1)=66.45-85+51=67練習(xí)題二33-(27+1)=26.95-(64-2)=5167+2

4、-19=86-(8+22)=24-(14+2)=16-8+0=71-(49+21)=0-(0-0)=40-62+50=24-(6+7)=37+44-76=81-12+5=30-(9+4)=67+30-82=70-(25+2)=81-(64-56)=23-(15+1)=88-80+4=15+1-7=23-(16-6)=60-22+32=85+8-26=72-(17+49)=80-(18-12)=20-(3+16)=2+35-14=22-(4+14)=1234567891011121314151617181920212223242568-30+17=27.32+45-23=28.65-(64+1)

5、=2919-(4-2)=30.54-(36-23)=3119-(16-4)=32.26+27-23=33.10+75-69=34.44+41-54=35.50-37+9=36.49+18-42=37.81-(42+7)=3829-19+60=39.7-74+69=40.52-83+42=41.11-72+68=42.12-(10-8)=43.23-21+0=44.46-(4-3)=45.59+28-78=46.79+15-33=47.8-(2+1)=48.18-12+2=49.4+71-16=50.26-24+12=52.19-0+47=53.83+15-22=5425-(11-5)=55.3

6、0-(19-4)=5642-(20-10)=5786-(49-2)=58.37-(14+4)=5934-(30-24)=6028-(25-11)=6159-(57-8)=62.38+33-45=6330-(17-3)=64.54+25-41=65.98-(37+12)=6656-19+19=67.57-(21+24)=6838+5-23=69.73-(3-2)=70.62-37+16=71.62-48+11=72.30-(1+4)=73.5+77-51=74.1-(1+0)=75.4 / 20練習(xí)題三0+23-7=26 .15+78-57=5163+30-60=.43-21+24=28-(24

7、-22)=.87+9-86=.32-(23+7)=18-10+24=64-13+17=5769+10-18=58.61+34-3=.63-50+13=83-13+2=70-35+16=6289-(60+23)=84-(72+1)=2+71-52=6560-(26-3)=6638-(37+1)=31+56-41 =79+16-48=6953-(24-13)=13-20+15=7183-(13-11)= 73-13+21=73.34-(5-1)=55-(31+10)=1234567891011121314151617181920212223242583-(39-11)=2774-19+13=28

8、.64-(57-54)=2991-(88-49)=3078-(61+6)=3122-46+40=32 .78-(4+9)=33 .70-(47-46)=3466-(42-35)=3546-(2+18)=3637+32-26=37.53-(8-7)=38.76+18-73=39.15-(5+1)=40.44+36-50=41.84+2-17=42.78-(33+33)=439+28-9=44.30-17+9=45.38-(36-8)=46.76+6-80=47.19-(6+5)=48.69-(39-25)=1-(1+0)=50.52.67+21-56=53.68+30-18=54.83-(26-

9、19)=55 .12-(6-2)=56.33-68+51 =16-58+57=.46-(25+2)=59.36-(16-10)=60.25+40-7=61.93-(58-44)=56+35-79=63.24+5-21 =64.68-(26-1)=53+5-55=43-(17+18)=67 .88-(40-11)=68 .36-(35+1)=50-(25+6)=70 .54-75+37=2+44-25=72 .96-(64-22)=.49-(19+23)=74 .14-(7-1)=75 . 44+37-79=6 / 20練習(xí)題四1.14-(8-2)=26 .58-(9+14)=519-(6-3)

10、=62+29-66=.43-(4+8)=19+51-63=7+12-15=31 + 19-18=10+44-48=44-24+23=18-(12+3)=70-(48+1)=33-68+55=28+20-32=39-(38-9)=39-(7-3)=62+20-46=58-(19+5)=49-76+37=64-(46-11)=38+43-22=70 .43+55-27=36-(35+1)=20+56-53=67-(45+17)=41-(11-1)=45-83+45=2.77+13-19=3.89-(62+21)=4.22+31-40=5.86-(24+45)=6.91-(35-17)=7.20-(

11、6+11)=8.19-(9-6)=9.83-(65-37)=10.9+0-6=3511.43-(15-8)=12.84-48+14=13.56-(5-3)=14.33+40-0=15.86-(65-37)=16.1-(1-1)=17.47-(7+25)=18.21-(4-1)=19.9-(3-1)=20.93-(83+1)=21.71-30+4=22.2+27-3=23.60+35-14=24.67-35+13=25.28-(13+6)=練習(xí)題五27 .64-(22-3)=52 .28.69-5+27=5329 .99-(39+59)=5430.6-(2+3)=5531.0+15-2=5632

12、.43-40+0=5733 .35-(18-17)=5834.17+76-21=59.81-(23+52)=60 .36 .65-(39+25)=6137 .45+25-60=62.38 .88-(18-6)=63.39 .85+11-2=64.40. 68-(6-1)=6541 .20-1+75=66.42. 49-50+26=6743 .61-2+18=68.44 .99-(10+31)=6945.18-(13+4)=46 .12-(10+1)=7147 .2+44-23=72.48 .42-75+49=73.49 .35-(21-10)=7450. 51 + 13-57=752.77+1

13、3-19=3.89-(62+21)=4.22+31-40=5.86-(24+45)=6.91-(35-17)=7.20-(6+11)=8.19-(9-6)=9.83-(65-37)=10.9+0-6=3511.43-(15-8)=12.84-48+14=13.56-(5-3)=14.33+40-0=15.86-(65-37)=16.1-(1-1)=17.47-(7+25)=18.21-(4-1)=19.9-(3-1)=20.93-(83+1)=21.71-30+4=22.2+27-3=23.60+35-14=24.67-35+13=25.28-(13+6)=練習(xí)題六27 .64-(22-3)=

14、52 .28.69-5+27=5329 .99-(39+59)=5430.6-(2+3)=5531.0+15-2=5632.43-40+0=5733 .35-(18-17)=5834.17+76-21=59.81-(23+52)=60 .36 .65-(39+25)=6137 .45+25-60=62.38 .88-(18-6)=63.39 .85+11-2=64.40. 68-(6-1)=6541 .20-1+75=66.42. 49-50+26=6743 .61-2+18=68.44 .99-(10+31)=6945.18-(13+4)=46 .12-(10+1)=7147 .2+44-2

15、3=72.48 .42-75+49=73.49 .35-(21-10)=7462+29-66=.43-(4+8)=19+51-63=7+12-15=31 + 19-18=10+44-48=44-24+23=18-(12+3)=70-(48+1)=33-68+55=28+20-32=39-(38-9)=39-(7-3)=62+20-46=58-(19+5)=49-76+37=64-(46-11)=38+43-22=70 .43+55-27=36-(35+1)=20+56-53=67-(45+17)=41-(11-1)=45-83+45=50. 51 + 13-57=7510 / 2010-8+1

16、=26.60+38-61=5192-(28+50)=1234567891011121314151617181920212223242592-(44+26)=2758-(39-14)=2851-(40+7)=2951-(18+5)=3054-18+45=31.11+51-51=32.94-(50-28)=3384-(49-20)=3487-8+2=35.40-(38+1)=3657+30-35=37.86+11-73=38.90-(21+23)=3949-(16-13)=4094-(62-14)=410-(0+0)=42.26+51-73=43.92-(15+26)=4462-30+14=45.

17、71-8+3=46.52-(24+16)=4715-(4-2)=48.15-9+11=49.33-(5+4)=50.56-49+35= .56-(11-4)=74+24-9=83+0-4=73-(60-51)=23-(8+7)=5716-9+34=14-(2-1)=83-(10+11)=58+5-43=78-38+17=6268+21-58=630+92-74=.93-(28+45)=.21+23-36=38-(7+9)=6782+5-77=68.23+66-60= 47-5+3=7036-19+9=71.21+46-17= 50-(27+11)=35-(3-1)=749-(2-1)=7552

18、.75-(65+3)=53.26-(24+1)=54.87-77+6=55.21-(12-1)=56.77+19-8=82-51 + 15=58.12+67-31 =59.84+15-9=60.23-1+69=61.34-7+36=17+73-50=87-(51-34)=64 .58-(15-6)=65 .73-13+26=66 .15-12+6=64-1 + 1 =9+88-85=69 .26-(21+4)=56+37-30=42+48-39=72 .13-(10+1)=73 .1-(1-1)=32-(12-9)=67-(35+12)=練習(xí)題七11 / 2075+14-38=26 .27-1

19、1+45=5146-35+16=1234567891011121314151617181920212223242512-(1 + 10)= 21-(12+5)= 83-58+10=89+2-1=66-47+13= 44-56+51=46+41-44=61-33+33= 2-(1+1)=76-26+0=47+32-62=27 .20+9-10=28 .23-(6+7)=29 .64-(54-10)=30 .44-(19+13)=31 .52-(13-10)=32 .30-(23-12)=33 .50-37+2=34 .30+58-53=52.10+46-41 =53.38-(4-2)=54.82

20、-(35-17)=55.19-(4-2)=56.46-(15+9)=57.37+18-7=58 .5-(2-1)=59 .85-(19-17)=35 .7+0-5=60.32+0-8=36 .37+39-74=61.20-18+64=37 .10-(7+1)=62.82+0-35=72-(60-18)=38 . 68-(22-18)=63 .44-20+24=89-(49+33)=39 .15+18-10=64 .82-61 + 16=32-0+26=40.52+20-62=41.63+12-8=42.30-(9-5)=43.7-(2-1)=44.82+9-1=45.12-(11 + 1)=6

21、5 .7-(2+3)=84-76+5=66.40-(10-8)=41-29+27=67.68-(25+8)=73+4-30=68.26+29-18=5-0+88=69.99-(12+1)=64+18-63=70.37+45-8=31-(17-14)=46 . 6-(4+1)=71 . 48+13-35=58-(16+14)=4781-(77+3)=72 .92-(15-2)=62-(53+7)=1+0-0=73 .37-(5-3)=53+40-42=49 .17-(10+1)=74 .95-(75-69)=14-30+21=50 .26-6+18=75 .57-(26-25)=練習(xí)題八12 /

22、 201.59-15+28=26 .46-27+16=51.53-21+19=2.51+32-22=3.30+67-62=4.38-(24-7)=5.86-(27-21)=6.13-(12+1)=7.29-87+67=8.4-(3-1)=9.41+27-21 =10.9+87-16=11.75-(8-4)=12.16-56+50=13.36+50-25=14.56-(38-31)=15.1+98-39=16.29-33+14=17.48-(45-14)=18.71-59+5=19.79-(12+19)=20.95-(62-60)=21.61+26-76=22.39-1+4=23.63-21 +

23、 18=24.73-38+25=25.43-(16-12)=練習(xí)題九79-45+2=76-(35-1)=45+52-94=15+30-0=60-(28-18)=97-(25+6)=77-(7-2)=59-21+34=59-(49+2)=22+41-38=48-31+41=3-(1 + 1)=64 .24-(15+2)=22-(12+9)=71+15-24=58-66+17=49+6-17=69 .53-(7-4)=54+38-52=60-(27-17)=59-(14-1)=.49-(9-7)=68-31+2=60-(13+44)=27 .36-15+14=52.28 .16-(1-1)=53.

24、29 .80+5-2=54.30. 35-16+11=5531. 82-65+8=5632 .26-(6-5)=57.33 .63-59+29=58.34 .63-(2+55)=5935 .22-(7+9)=60.36 .47-(26+12)=6137 .15+55-16=62.38 .65-56+10=63.39 . 79-(63-35)=40 .88-16+5=65.41 .39-(11-4)=66.42 . 47-28+25=6743 .44-(2+16)=6844 . 56-(20+32)=45 . 81 + 15-84=7046 .17-(2-1)=71.47 .59-(32+26)

25、=7248 .79-(61+7)=7349 .35+46-74=74 .50 . 77+8-46=7513 / 2026 .26-9+26=51 .68-(26+28)=1234567891011121314151617181920212223242599-(35+40)= 28+59-25=2752-(28-24)= 65-(40-26)= 4+5-5=30 .97-(26-2)=3122-(3+16)= 54-24+0=3319-(9+9)=340-(0-0)=3539+13-21=3686-8+5=3741-(17-9)=3865+6-43=392-(1-1)=4054-(41-16)=

26、 41 41-(32-26)= 42 35-57+50=4317-9+8=4483-(31-30)= 45 67-(27+5)=4674-(14+20)= 47 80-54+6=4818-9+0=4931-16+3=503273-(71-41)=17-(14+1)=42-(2+11)=76-(53-10)=5540-(29-23)=59-0+13=19-(2-1)=5860-(53-31)=51-(45-33)=34-29+0=6130-(8+19)=15-(2+12)=22-20+12=6452-75+44=6543+44-48=6697-(55-15)=51-(28+13)=57-(27+

27、27)=12-(11+1)=80+16-54=7159+13-38=7289+8-65=730-(0-0)=7448-37+1=7552 .9+59-7=53 .90-(1+77)=54 .19-(18+1)=16-(1-1)=56 .81 + 11-89=57 . 40-(28+7)=66-(33+21)=59.92-(70+4)=60.43-17+15=47-(33-24)=62.70+17-17=63.54+38-14=13+40-39=63-(10+19)=38-(22-3)=67.16-40+26=68.25-18+10=69.16-(7-6)=70.10+71-29=35-(17-

28、8)=60-(53-28)=76+2-15=.40-(8-5)= 71-(29-13)=14 / 20練習(xí)題十1.90-(57+18)=26 .17+44-58=5171+4-25=2.41+34-2=3.26-(4+7)=4.35-(3+12)=5.17-(16+1)=6.8-65+62=7.56+36-46=8.17-(11 + 1)=9.11-(6+4)=10.51-(35+9)=11.75-(47-35)=12.92-(37+12)=13.27-(24+2)=14.21-(19+1)=15.10-(9-4)=16.43-(33+5)=17.56+33-56=18.88-(79+6)=1

29、9.44-73+48=20.29+40-40=21.36-32+20=22.65+17-78=23.42-53+31 =24.55-(20-14)=25.19+43-11 =練習(xí)題一答案27 .5-(2-1)=5228 .16-(4+6)=5329 .55+21-69=5430 .4-(2-1)=5531 .23+11-25=5632 .38-(12+15)=33 .9+5-3=58 .34 .1-(1-1)=5935 .0-(0-0)=6036 .38+59-29=6137 .58-66+13=6238 . 3-3+31 =39 . 37-(10-5)=40 .4+75-74=6541 .

30、28-26+71 =42 .89+1-3=6743 . 90-(37-16)=44 .34-14+64=6945 .10-(8-6)=7046 .38-(5-2)=7147 .10-(2-1)=7248 .79+14-55=7349 . 55-(32-11)=50 .4-(2-1)=7586-(73-64)=63-(13+31)=63-(6+2)=.46-(16+3)=28-7+70=57 .55-(1 + 11)=70-41+16=54-(10+5)=88-(22+29)=30-8+23=94-(31+50)=63 . 32-2+4=64 . 73-20+17=30-1+3=66 .82-(

31、71+5)=84+14-87=68 .21-74+62=96-(32+27)=21+57-6=23+57-23=44-(17+25)=94-(68+24)=74 .22+24-14=61+38-91 =15 / 202.4427 .4352 .443.1928 .253 .04.529 .2754 .135.4830 .2255 .46.431 .5156 .67.1432 .3757 .188.1733 .958 .709.1034 .2559 .7810 .2635 .3560 .011 .3636 .5561 .5612 .4337 .2362 .5113 .6238 .6063 .91

32、4 .2939 .564 .6115 .740 .4265 .1216 .141 .766 .1617 .4042 .1167 .2418 .443 .6168 .7619 .044 .5069 .4420 .4645 .3070 .8221 .2046 .1471 .4922 .7447 .5072 .5223 .4148 .6673 .824 .2949 .3774 .225 .3650 .9475 .52練習(xí)題二答1 .526 .3351 .502.5527 .1452 .563.5428 .6653 .84.029 .7654 .85.1730 .1955 .16.4131 .1556

33、 .07.732 .3257 .288.3033 .3958 .119.1634 .1959 .510 .3135 .2860 .7411 .2236 .1461 .1712 .2537 .1062 .1513 .3238 .2663 .4314 .7039 .1664 .7315 .240 .3865 .716 .1141 .4966 .1217 .742 .5667 .918 .1043 .1268 .1319 .244 .2069 .7020 .4545 .7270 .6721 .946 .4171 .622 .6147 .2572 .7423 .548 .2573 .124 .849

34、.3174 .2325 .5950 .075 .4練習(xí)題三答1 .1626 .3651 .332.5527 .4652 .323.6828 .2653 .804.6129 .1054 .765.5230 .255 .86.1131 .3256 .167.1632 .6857 .158.6533 .6158 .199.6934 .9259 .3010 .5935 .2660 .5811 .2636 .7261 .7912 .4337 .5162 .1213 .5238 .663 .814 .2139 .1164 .4315 .940 .2165 .316 .3041 .3766 .817 .69

35、42 .067 .5918 .1243 .4668 .019 .2844 .4769 .1920 .2245 .4270 .1621 .1046 .871 .2122 .247 .8172 .5423 .848 .8173 .724 .5549 .3074 .825 .050 .1475 .2練習(xí)題四答1 .826 .3551 .62.7127 .4552 .253.628 .9153 .314.1329 .154 .75.1730 .155 .46.7331 .1356 .327.332 .357 .68.1633 .3458 .439.5534 .7259 .310 .335 .660 .

36、2111 .3636 .161 .2012 .5037 .1062 .1613 .5438 .7663 .1014 .7339 .9464 .3515 .5840 .6365 .3616 .141 .9466 .3417 .1542 .2567 .1018 .1843 .7768 .2919 .744 .5869 .5920 .945 .170 .7121 .4546 .171 .022 .2647 .2372 .2323 .8148 .1673 .524 .4549 .2474 .3125 .950 .775 .7練習(xí)題五答1 .826 .3551 .62.7127 .4552 .253.6

37、28 .9153 .314.1329 .154 .75.1730 .155 .46.7331 .1356 .327.332 .357 .68.1633 .3458 .439.5534 .7259 .310 .335 .660 .2111 .3636 .161 .2012 .5037 .1062 .1613 .5438 .7663 .1014 .7339 .9464 .3515 .5840 .6365 .3616 .141 .9466 .3417 .1542 .2567 .1018 .1843 .7768 .2919 .744 .5869 .5920 .945 .170 .7121 .4546

38、.171 .022 .2647 .2372 .2323 .8148 .1673 .524 .4549 .2474 .3125 .950 .775 .7練習(xí)題六答1 .326 .3751 .142.2227 .4252 .73.3328 .4953 .14.429 .8954 .165.2830 .7955 .106.8131 .6456 .887.1132 .857 .468.7233 .4158 .489.5534 .1359 .9010 .8135 .6260 .9111 .136 .2061 .6312 .5237 .5762 .4013 .2438 .3163 .7014 .4639

39、.1864 .4915 .4640 .2065 .8616 .4641 .866 .917 .042 .2267 .6418 .443 .1068 .1219 .5144 .2969 .120 .4645 .4570 .6321 .6646 .2671 .5122 .1247 .5072 .223 .1348 .1273 .124 .1749 .3374 .2925 .2450 .875 .20練習(xí)題1 .5126 .6151 .272.127 .1952 .153.428 .1053 .364.3529 .2054 .645.9030 .1255 .176.3231 .4956 .227.3932 .1957 .488.4333 .1558 .49.6134 .3559 .8310 .035 .260 .2411 .5036 .261 .6612 .1737 .262 .4713 .3038 .6463 .4814 .739 .2364 .3715 .5840 .065 .216 .1041 .1366 .3817 .6742 .3967 .3518 .2643 .4768 .3719 .644 .9369 .8620 .9045 .1970 .7421 .2846 .171