题目内容
估算.
| 496×3≈ | 354÷7≈ | 29×31≈ | 712÷9≈ |
(1)496×3,
≈500×3,
=1500;
(2)354÷7,
≈350÷7,
=50;
(3)29×31,
≈30×30,
=900;
(4)712÷9,
≈720÷9,
=80.
≈500×3,
=1500;
(2)354÷7,
≈350÷7,
=50;
(3)29×31,
≈30×30,
=900;
(4)712÷9,
≈720÷9,
=80.
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