简便计算(能简便的要简便)小学五年级水平
15.37*7.88-9.37*7.38+1.537*21.2-93.7*0.262(5+93+778+8988)*12.5...
15.37*7.88-9.37*7.38+1.537*21.2-93.7*0.262
(5+93+778+8988)*12.5 展开
(5+93+778+8988)*12.5 展开
6个回答
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1、解:15.37*7.88-9.37*7.38+1.537*21.2-93.7*0.262
=1.537*(78.8+21.2)-9.37*(7.38+2.62)
=1.537*100-9.37*10
=153.7-93.7
=60
2、解:(5+93+778+8988)*12.5
=(100+800+9000-36)*12.5
=(9900-36)*12.5
=10000*12.5-136*12.5
=12330
3、解:=10个(0.625*8)*8*12个2
=5个10次方*2个15次方
=1.537*(78.8+21.2)-9.37*(7.38+2.62)
=1.537*100-9.37*10
=153.7-93.7
=60
2、解:(5+93+778+8988)*12.5
=(100+800+9000-36)*12.5
=(9900-36)*12.5
=10000*12.5-136*12.5
=12330
3、解:=10个(0.625*8)*8*12个2
=5个10次方*2个15次方
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1.15.37*7.88-9.37*7.38+1.537*21.2-93.7*0.262
=15.37*7.88+15.37*2.12-9.37*7.38-9.37*2.62
=15.37*(7.88+2.12)-9.37*(7.38+2.62)
=15.37*10-9.37*10
=153.7-93.7
=60
2.(5+93+778+8988)*12.5
=(10-5+100-7+800-22+9000-12)*12.5
=(100+900+9000-90-46)*12.5
=(10000-136)*12.5
=125000-1700
=123300
3.
0.625*8*2=10,所以10个0.625*8*2=10^10,剩余1个8,2个2,相乘得32
所以得数为3.2*10^11
=15.37*7.88+15.37*2.12-9.37*7.38-9.37*2.62
=15.37*(7.88+2.12)-9.37*(7.38+2.62)
=15.37*10-9.37*10
=153.7-93.7
=60
2.(5+93+778+8988)*12.5
=(10-5+100-7+800-22+9000-12)*12.5
=(100+900+9000-90-46)*12.5
=(10000-136)*12.5
=125000-1700
=123300
3.
0.625*8*2=10,所以10个0.625*8*2=10^10,剩余1个8,2个2,相乘得32
所以得数为3.2*10^11
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1、解:15.37*7.88-9.37*7.38+1.537*21.2-93.7*0.262
=1.537*(78.8+21.2)-9.37*(7.38+2.62)
=1.537*100-9.37*10
=153.7-93.7
=60
2、解:(5+93+778+8988)*12.5
=(100+800+9000-36)*12.5
=(9900-36)*12.5
=10000*12.5-136*12.5
=12330
=1.537*(78.8+21.2)-9.37*(7.38+2.62)
=1.537*100-9.37*10
=153.7-93.7
=60
2、解:(5+93+778+8988)*12.5
=(100+800+9000-36)*12.5
=(9900-36)*12.5
=10000*12.5-136*12.5
=12330
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15.37*7.88-9.37*7.38+1.537*21.2-93.7*0.262
=15.37(7.88+2.12)-9.37(7.38+2.62)
=153.7-93.7
=60
(5+93+778+8988)*12.5
=(5+100-7+800-22+9000-12)×12.5
=(9900-36)×12.5
=9864×25/2
=123300
=15.37(7.88+2.12)-9.37(7.38+2.62)
=153.7-93.7
=60
(5+93+778+8988)*12.5
=(5+100-7+800-22+9000-12)×12.5
=(9900-36)×12.5
=9864×25/2
=123300
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依据:0.625*2*8=10
取10个0.625,10个8,10个2,(0.625*2*8)的10次方,即10^10
剩余1个8,2个2,1*8*2*2=32
得(10^10)*32
取10个0.625,10个8,10个2,(0.625*2*8)的10次方,即10^10
剩余1个8,2个2,1*8*2*2=32
得(10^10)*32
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