1、= 63+10= 46-40+28= 28+3+20= 95-20+16= 16+70-40= -50= 0-2= 0-8= -30= 60-50-8= 8+50-30= 65-60+80= 643 53-8 61-7 18-9 31-5 12-8 79-8 18-8 62-9 75-5 61-8 80-40 44-743-9 90-5 32-8 63+7 3+43 6+66 77+7 +4 45-5 5+87 6+56 15-6 18-9 45-5= 75-60 27-4 454410=6= = 37-20= =0= 8-2=47+10-7=8+8-10= 11+2= 17+3= 40+30

2、= 4+32= 80-30=+30-70= 20-20=-3=0=-6=7=0-90=10= 6=10=88-10=-3=40=6=10=10=-2=50=80-10=0-80=-5=0=20-7=47+10-17=+50-9=2 46-40+60= 50-40-8= 28-10 161090-70+50= 20-20=-3= =47-5=24+6-30= = -30= = = = -70= = = = = = +30=1-7=6=7=45-7= 75-60= 62+8= 96-5= 69+30= 76-9= 58-40= 46-40= 27-20= 25+8= 50+16= 46-9= 97

3、-60= 14-5= 57-6= 39-4= 81+7= 76-6= 35+20= 56+40= 66-30= 4+9= 81-7= 93-70= 50-6=46-7=7=7=-2=0=48-5=7= 65-5= 15-6= 64-20= 39-7= 75-50= 24-6= 40-9= 63-8= 81-4= 54-7= 60-3= 68-5= 20+3= 25+3= 76+3= 2+30= 69+30= 7+63= 45+6= 74+9= 50+21= 40+30= 95-5= 80-80=63-40-10= 8-15=90-10= 8-18= 91-10= 9-15=81-10= = 9

4、2-10= =49-11= = -2= = 42-7= -2= -2= = 20-1=7=20-1=45-3= = 87-10= =42-7= = = 20-1=7=-2= = 45-5= = = 42-7= = = 87-10= = = = 90-10=4-3=-1=5=2-1=4-1=3-1=-8=7-1=9-1= 018=55=219= 55-17=( )5=30 26=1669= ( )4=20( )6=24( )5 22 ( )29 4( ) 106( )27 3( )13 ( )5 267( )58 ( )435 ( )4189( )28 ( )830 ( )650 45+36=

5、26+56= 61+39= 26+58=55+26= 60-32= 64+36= 29+74=73-29= 69+34= 28+58= 28+36=64-16= 46+34= 51+28= 96-68=56+26= 26+69= 68-56= 69-26=36+45= 68-26= 19+38= 23+68=32+49= 47-29= 43+26= 72-56=98-53= 49+25= 54+42= 27+69=31+38= 91-73= 27+56= 41-28=33+53= 51+29= 35+37= 97-54= 49+47=46+3= 16+38= 23+38= 51-35= 62+19=69+19= 80+7= 98-25= 46+45= 55-25=34+36= 49+16= 54-36= 78+14= 25+66