Question

简便计算：（1）4.56×0.27+4.56×0.63+0.456 （2）5.85+6.13+3.87－1.85 （3）12.5×5.7×8－5.7×90

简便

Answer 1

4.56×0.27+4.56×0.63+0.456
=4.56×(0.27+0.63+1)
=4.56×2
=9.12

5.85+6.13+3.87－1.85
=5.85－1.85+6.13+3.87
=4+10
=14

12.5×5.7×8－5.7×90
=100×5.7－5.7×90
=5.7×（100-90）
=5.7×10
=57

追问

第一题错了

追答

4.56×0.27+4.56×0.63+0.456
=4.56×(0.27+0.63+0.1)
=4.56×1
=4.56

追问

还有第三题

追答

第三题对的

追问

看错了，嘻嘻。不过，谢谢！

Answer 2

1）4.56×0.27+4.56×0.63+0.456 =4.56(0.27+0.63+0.1)
2）5.85+6.13+3.87－1.85 =(5.85-1.85)+(6.13+3.87)
3）12.5×5.7×8－5.7×90=5.7(12.5×8-90)