题目内容
估算.
| 97×6≈ | 309×4≈ | 61÷2≈ | 9×59≈ | 88÷3≈ | 55÷9≈ |
(1)97×6,
≈100×6,
=600;
(2)309×4,
≈300×4,
=1200;
(3)61÷2,
≈60÷2,
=30;
(4)9×59,
≈9×60,
=540;
(5)88÷3,
≈90÷3,
=30;
(6)55÷9,
≈54÷9,
=6.
≈100×6,
=600;
(2)309×4,
≈300×4,
=1200;
(3)61÷2,
≈60÷2,
=30;
(4)9×59,
≈9×60,
=540;
(5)88÷3,
≈90÷3,
=30;
(6)55÷9,
≈54÷9,
=6.
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