用简便方法计算 950÷50= 430÷20= 870÷80=

2024-12-03 20:43:40
推荐回答(1个)
回答1:

①950÷50
=950÷(10×5)
=950÷10÷5
=95÷5
=19

②430÷20
=430÷(10×2)
=430÷10÷2
=43÷2
=21.5

③870÷80
=870÷(10×8)
=870÷10÷8
=87÷8
=10 7 8