Question

脱式计算（能简算的要简算）130÷0.4÷2.5  ...

脱式计算（能简算的要简算）130÷0.4÷2.5 5.4×1011.6×55.4-55.4×0.6 0.5×37×0.2．

Answer 1

（1）130÷0.4÷2.5
=130÷（0.4×2.5）
=130÷1
=130

（2）5.4×101
=5.4×（100+1）
=5.4×100+1×5.4
=545.4

（5）1.6×55.4-55.4×0.6
=（1.6-0.6）×55.4
=1×55.4
=55.4

（6）0.5×37×0.2
=0.5×0.2×37
=0.1×37
=3.7