题目内容
直接写出得数.
×1=
×0=
×
=
×4×
=
×
=
×
×
=
×
=
×14+
×11=
| 8 |
| 15 |
| 3 |
| 7 |
| 9 |
| 11 |
| 5 |
| 9 |
| 2 |
| 9 |
| 3 |
| 8 |
| 5 |
| 28 |
| 4 |
| 9 |
| 1 |
| 5 |
| 1 |
| 5 |
| 5 |
| 12 |
| 10 |
| 91 |
| 13 |
| 20 |
| 17 |
| 25 |
| 17 |
| 25 |
分析:根据分数乘法的计算法则,分子相乘的积作分子,分母相乘的积作分母,能约分先约分计算简便.其中
×14+
×11,运用乘法分配律进行简算.
| 17 |
| 25 |
| 17 |
| 25 |
解答:解:直接写出得数.
×1=
;
×0=0;
×
=
;
×4×
=
;
×
=
;
×
×
=
;
×
=
;
×14+
×11=17.
| 8 |
| 15 |
| 8 |
| 15 |
| 3 |
| 7 |
| 9 |
| 11 |
| 5 |
| 9 |
| 5 |
| 11 |
| 2 |
| 9 |
| 3 |
| 8 |
| 1 |
| 3 |
| 5 |
| 28 |
| 4 |
| 9 |
| 5 |
| 63 |
| 1 |
| 5 |
| 1 |
| 5 |
| 5 |
| 12 |
| 1 |
| 60 |
| 10 |
| 91 |
| 13 |
| 20 |
| 1 |
| 14 |
| 17 |
| 25 |
| 17 |
| 25 |
点评:此题考查的目的是牢固掌握分数乘法的计算法则,并且能够正确熟练地进行口算.
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