题目内容
估算.
| 82×8≈ | 396×6≈ | 608×7≈ | 685×4≈ |
(1)82×8,
≈80×8,
=640;
(2)396×6,
≈400×6,
=2400;
(3)608×7,
≈600×7,
=4200;
(4)685×4,
≈700×4,
=2800.
≈80×8,
=640;
(2)396×6,
≈400×6,
=2400;
(3)608×7,
≈600×7,
=4200;
(4)685×4,
≈700×4,
=2800.
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