3.9×3.9,2.85×5.35+2.85×4.65,6.05÷1.25÷0.8全部简算?

2025-03-22 22:53:56
推荐回答(2个)
回答1:

3.9×3.9
=(4-1)×(4-1)
=4×4-1
=15
2.85×5.35+2.85×4.65
=2.85×(5.35+4.65)
=2.85×10
=28.5
6.05÷1.25÷0.8
=6.05÷(1.25×0.8)
=6.05÷1
=6.05

回答2:

简便方法如图所示