2025年大數(shù)乘大數(shù)題庫(kù)及答案1.計(jì)算：1234×5678計(jì)算過(guò)程：先用1234×8=9872，記末位；1234×70=86380，末位對(duì)齊十位；1234×600=740400，末位對(duì)齊百位；1234×5000=6170000，末位對(duì)齊千位；相加：9872+86380=96252；96252+740400=836652；836652+6170000=6996652答案：69966522.計(jì)算：3456×7890計(jì)算過(guò)程：3456×0=0（末位）；3456×90=311040（末位對(duì)齊十位）；3456×800=2764800（末位對(duì)齊百位）；3456×7000=24192000（末位對(duì)齊千位）；相加：0+311040=311040；311040+2764800=3075840；3075840+24192000=27267840答案：272678403.計(jì)算：5678×9123計(jì)算過(guò)程：5678×3=17034；5678×20=113560（末位對(duì)齊十位）；5678×100=567800（末位對(duì)齊百位）；5678×9000=51102000（末位對(duì)齊千位）；相加：17034+113560=130594；130594+567800=698394；698394+51102000=51800394答案：518003944.計(jì)算：7890×12345計(jì)算過(guò)程：7890×5=39450；7890×40=315600（末位對(duì)齊十位）；7890×300=2367000（末位對(duì)齊百位）；7890×2000=15780000（末位對(duì)齊千位）；7890×10000=78900000（末位對(duì)齊萬(wàn)位）；相加：39450+315600=355050；355050+2367000=2722050；2722050+15780000=18502050；18502050+78900000=97402050答案：974020505.計(jì)算：12345×67890計(jì)算過(guò)程：12345×0=0；12345×90=1111050（末位對(duì)齊十位）；12345×800=9876000（末位對(duì)齊百位）；12345×7000=86415000（末位對(duì)齊千位）；12345×60000=740700000（末位對(duì)齊萬(wàn)位）；相加：0+1111050=1111050；1111050+9876000=10987050；10987050+86415000=97402050；97402050+740700000=838102050答案：8381020506.計(jì)算：98765×43210計(jì)算過(guò)程：98765×0=0；98765×10=987650（末位對(duì)齊十位）；98765×200=19753000（末位對(duì)齊百位）；98765×3000=296295000（末位對(duì)齊千位）；98765×40000=3950600000（末位對(duì)齊萬(wàn)位）；相加：0+987650=987650；987650+19753000=20740650；20740650+296295000=317035650；317035650+3950600000=4267635650答案：42676356507.計(jì)算：23456×78901計(jì)算過(guò)程：23456×1=23456；23456×0=0（末位對(duì)齊十位）；23456×900=21110400（末位對(duì)齊百位）；23456×8000=187648000（末位對(duì)齊千位）；23456×70000=1641920000（末位對(duì)齊萬(wàn)位）；相加：23456+0=23456；23456+21110400=21133856；21133856+187648000=208781856；208781856+1641920000=1850701856答案計(jì)算：34567×89012計(jì)算過(guò)程：34567×2=69134；34567×10=345670（末位對(duì)齊十位）；34567×0=0（末位對(duì)齊百位）；34567×9000=311103000（末位對(duì)齊千位）；34567×80000=2765360000（末位對(duì)齊萬(wàn)位）；相加：69134+345670=414804；414804+0=414804；414804+311103000=311517804；311517804+2765360000=3076877804答案：30768778049.計(jì)算：45678×90123計(jì)算過(guò)程：45678×3=137034；45678×20=913560（末位對(duì)齊十位）；45678×100=4567800（末位對(duì)齊百位）；45678×0=0（末位對(duì)齊千位）；45678×90000=4111020000（末位對(duì)齊萬(wàn)位）；相加：137034+913560=1050594；1050594+4567800=5618394；5618394+0=5618394；5618394+4111020000=4116638394答案：411663839410.計(jì)算：56789×123456計(jì)算過(guò)程：56789×6=340734；56789×50=2839450（末位對(duì)齊十位）；56789×400=22715600（末位對(duì)齊百位）；56789×3000=170367000（末位對(duì)齊千位）；56789×20000=1135780000（末位對(duì)齊萬(wàn)位）；56789×100000=5678900000（末位對(duì)齊十萬(wàn)位）；相加：340734+2839450=3180184；3180184+22715600=25895784；25895784+170367000=196262784；196262784+1135780000=1332042784；1332042784+5678900000=7010942784答案：701094278411.計(jì)算：67890×234567計(jì)算過(guò)程：67890×7=475230；67890×60=4073400（末位對(duì)齊十位）；67890×500=33945000（末位對(duì)齊百位）；67890×4000=271560000（末位對(duì)齊千位）；67890×30000=2036700000（末位對(duì)齊萬(wàn)位）；67890×200000末位對(duì)齊十萬(wàn)位）；相加：475230+4073400=4548630；4548630+33945000=38493630；38493630+271560000=310053630；310053630+2036700000=2346753630；234675363015924753630答案：1592475363012.計(jì)算：78901×345678計(jì)算過(guò)程：78901×8=631208；78901×70=5523070（末位對(duì)齊十位）；78901×600=47340600（末位對(duì)齊百位）；78901×5000=394505000（末位對(duì)齊千位）；78901×40000=3156040000（末位對(duì)齊萬(wàn)位）；78901×300000=23670300000（末位對(duì)齊十萬(wàn)位）；相加：631208+5523070=6154278；6154278+47340600=53494878；53494878+394505000=447999878；447999878+3156040000=3604039878；3604039878+23670300000=27274339878答案：2727433987813.計(jì)算：89012×456789計(jì)算過(guò)程：89012×9=801108；89012×80=7120960（末位對(duì)齊十位）；89012×700=62308400（末位對(duì)齊百位）；89012×6000=534072000（末位對(duì)齊千位）；89012×50000=4450600000（末位對(duì)齊萬(wàn)位）；89012×400000=35604800000（末位對(duì)齊十萬(wàn)位）；相加：801108+7120960=7922068；7922068+62308400=70230468；70230468+534072000=604302468；604302468+4450600000=5054902468；5054902468+35604800000=40659702468答案：4065970246814.計(jì)算：90123×567890計(jì)算過(guò)程：90123×0=0；90123×90=8111070（末位對(duì)齊十位）；90123×800=72098400（末位對(duì)齊百位）；90123×7000=630861000（末位對(duì)齊千位）；90123×60000=5407380000（末位對(duì)齊萬(wàn)位）；90123×500000=45061500000（末位對(duì)齊十萬(wàn)位）；相加：0+8111070=8111070；8111070+72098400=80209470；80209470+630861000=711070470；711070470+5407380000=6118450470；6118450470+45061500000=51180050470答案：5118005047015.計(jì)算：10234×987654計(jì)算過(guò)程：10234×4=40936；10234×50=511700（末位對(duì)齊十位）；10234×600=6140400（末位對(duì)齊百位）；10234×7000=71638000（末位對(duì)齊千位）；10234×80000=818720000（末位對(duì)齊萬(wàn)位）；10234×900000=9210600000（末位對(duì)齊十萬(wàn)位）；相加：40936+511700=552636；552636+6140400=6693036；6693036+71638000=78331036；78331036+818720000=897051036；897051036+9210600000=10107651036答案：1010765103616.計(jì)算：20345×876543計(jì)算過(guò)程：20345×3=61035；20345×40=813800（末位對(duì)齊十位）；20345×500=10172500（末位對(duì)齊百位）；20345×6000=122070000（末位對(duì)齊千位）；20345×70000=1424150000（末位對(duì)齊萬(wàn)位）；20345×800000=16276000000（末位對(duì)齊十萬(wàn)位）；相加：61035+813800=874835；874835+10172500=11047335；11047335+122070000=133117335；133117335+1424150000=1557267335；1557267335+16276000000案：1783326733517.計(jì)算：30456×765432計(jì)算過(guò)程：30456×2=60912；30456×30=913680（末位對(duì)齊十位）；30456×400=12182400（末位對(duì)齊百位）；30456×5000=152280000（末位對(duì)齊千位）；30456×60000=1827360000（末位對(duì)齊萬(wàn)位）；30456×700000=21319200000（末位對(duì)齊十萬(wàn)位）；相加：60912+913680=974592；974592+12182400=13156992；13156992+152280000=165436992；165436992+1827360000=1992796992；1992796992+21319200000=23311996992答案：2331199699218.計(jì)算：40567×654321計(jì)算過(guò)程：40567×1=40567；40567×20=811340（末位對(duì)齊十位）；40567×300=12170100（末位對(duì)齊百位）；40567×4000=162268000（末位對(duì)齊千位）；40567×50000=2028350000（末位對(duì)齊萬(wàn)位）；40567×600000=24340200000（末位對(duì)齊十萬(wàn)位）；相加：40567+811340=851907；851907+12170100=13022007；13022007+162268000=175290007；175290007+2028350000=2203640007；2203640007+24340200000=26543840007答案：2654384000719.計(jì)算：50678×543210計(jì)算過(guò)程：50678×0=0；50678×10=506780（末位對(duì)齊十位）；50678×200=10135