题目内容
估算:
| 112×6≈ | 198×5≈ | 270÷28≈ | 491÷71≈ |
112×6,
≈100×6,
=600;
198×5,
≈200×5,
=1000;
270÷28,
≈300÷30,
=10.
≈100×6,
=600;
198×5,
≈200×5,
=1000;
270÷28,
≈300÷30,
=10.
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题目内容
| 112×6≈ | 198×5≈ | 270÷28≈ | 491÷71≈ |