用商不变的性质计算3.9÷2.615.6÷0.25
问题描述:
用商不变的性质计算3.9÷2.6
15.6÷0.25
答
3.9÷2.6
=(1.3×3)÷(1.3×2)
=3÷2
=1.5
15.6÷0.25
=(4×15.6)÷(4×0.25)
=62.4÷1
=62.4