Question

5.2*0.9+0.9怎样简便运算？？

5.2*0.9+0.9怎样简算？？？？

Answer 1

5.2*0.9+0.9
=0.9×(5.2+1)
=0.9×6.2
=0.9×(6+0.2)
=0.9×6+0.9×0.2
=5.4+0.18
=5.58

追问

可以吗？

追答

正确答案。