题目内容
计算下面各题.
×14×
22÷
÷
×
÷
16×
÷
÷3×
×(9+
-75%)
| 9 |
| 14 |
| 2 |
| 9 |
| 11 |
| 12 |
| 3 |
| 4 |
| 3 |
| 8 |
| 5 |
| 6 |
| 15 |
| 16 |
16×
| 3 |
| 8 |
| 2 |
| 7 |
| 8 |
| 15 |
| 5 |
| 6 |
| 8 |
| 9 |
| 3 |
| 4 |
分析:根据乘法交换律和结合律,结合题目的具体情况进行计算即可.
解答:解:
×14×
=9×
=2;
22÷
÷
=22×
×
=32;
×
÷
=
×
=
16×
÷
=6×
=21;
÷3×
=
×
×
=
;
×(9+
-75%)
=
×[9+(
-75%)]
=
×9
=8.
| 9 |
| 14 |
| 2 |
| 9 |
=9×
| 2 |
| 9 |
=2;
22÷
| 11 |
| 12 |
| 3 |
| 4 |
=22×
| 12 |
| 11 |
| 4 |
| 3 |
=32;
| 3 |
| 8 |
| 5 |
| 6 |
| 15 |
| 16 |
=
| 5 |
| 16 |
| 16 |
| 15 |
=
| 1 |
| 3 |
16×
| 3 |
| 8 |
| 2 |
| 7 |
=6×
| 7 |
| 2 |
=21;
| 8 |
| 15 |
| 5 |
| 6 |
=
| 8 |
| 15 |
| 1 |
| 3 |
| 5 |
| 6 |
=
| 4 |
| 27 |
| 8 |
| 9 |
| 3 |
| 4 |
=
| 8 |
| 9 |
| 3 |
| 4 |
=
| 8 |
| 9 |
=8.
点评:考查了分数的四则运算,在计算过程中要按照运算顺序和运算法则,结合运算律灵活进行计算.
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