题目内容
口算.
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1
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分析:①-⑤,⑧题,约分计算; ⑥题,先算乘法,再算加法; ⑦把带分数化为假分数,约分计算.
解答:解:①
×7=
; ②
×
=
; ③
×6=
; ④
×
=
;
⑤
×3×
=
,⑥
+
×
=
; ⑦1
×
=1; ⑧
×10=
;
| 3 |
| 14 |
| 3 |
| 2 |
| 3 |
| 7 |
| 3 |
| 7 |
| 9 |
| 49 |
| 3 |
| 10 |
| 9 |
| 5 |
| 9 |
| 16 |
| 8 |
| 3 |
| 3 |
| 2 |
⑤
| 1 |
| 8 |
| 8 |
| 9 |
| 1 |
| 3 |
| 1 |
| 4 |
| 3 |
| 4 |
| 1 |
| 3 |
| 1 |
| 2 |
| 2 |
| 3 |
| 3 |
| 5 |
| 7 |
| 15 |
| 14 |
| 3 |
点评:完成此题,主要通过约分简算.
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