题目内容
用简便方法计算
950÷50=
430÷20=
870÷80=
950÷50=
430÷20=
870÷80=
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
=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 |
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