题目内容
估算.
| 78×9≈ | 83÷8≈ | 794×3≈ | 71÷9≈ |
78×9,
≈80×9,
=720;
83÷8,
≈80÷8,
=10;
794×3,
≈800×3,
=2400;
71÷9,
≈70÷10,
=7.
≈80×9,
=720;
83÷8,
≈80÷8,
=10;
794×3,
≈800×3,
=2400;
71÷9,
≈70÷10,
=7.
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题目内容
| 78×9≈ | 83÷8≈ | 794×3≈ | 71÷9≈ |