脱式计算,能简便计算的要简便计算2.5×8×0.4×0.125; &nb...

2025-02-19 12:37:28
推荐回答(1个)
回答(1):

(1)2.5×8×0.4×0.125
=(2.5×0.4)×(8×0.125)
=1×1
=1

(2)0.88×4.9+5.1×0.88
=0.88×(4.9+5.1)
=0.88×10
=8.8

(3)7.9÷12.5÷0.8
=7.9÷(12.5×0.8)
=7.9÷10
=0.79

(4)9.1-1.2÷6-6.24
=9.1-0.2-6.24
=2.66