用简便方法计算6.25x1.02 37.5X4.8+37.5X5.2 52X9.9 (0.125+1.25+12.5)X8 52X9.9 5.86X99+5.86

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2024-12-26 21:29:38
推荐回答(1个)
回答1:

(1)=6.25*(1+0.02)
=6.25+0.125
=6.375
(2)=37.5*(4.8+5.2)
=37.5*10
=375
(3)=52*(10-0.1)
=52*10-52*0.1
=520-5.2
=514.8
(4)=8*0.125+8*1.25+8*12.5
=1+10+100
=111
5同上
(6)=5.86*(99+1)
=5.86*100
=586