题目内容
直接写得数
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1×
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0÷
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1÷
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22÷
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分析:(1)-(12)题,属于分数的乘法,整数可以看作分母为1的分数,把分子相乘的积做分子,分母相乘的积做分母,能约分的要约分;
(13)-(20)题,属于分数的除法,先改为乘法,然后再计算.
(13)-(20)题,属于分数的除法,先改为乘法,然后再计算.
解答:解:
×15=
;
×2=
;
×
=
;
×
=
;
×
=
;
1×
=
;
×
=
;
×34=8;
×
=
;
×
=
;
×
=
;
×
=
;
÷10=
;
÷
=
; 0÷
=0;
÷4=
; 1÷
=
; 22÷
=24;
÷
=1;
÷0.4=1.
| 5 |
| 9 |
| 25 |
| 3 |
| 3 |
| 5 |
| 6 |
| 5 |
| 1 |
| 4 |
| 4 |
| 5 |
| 1 |
| 5 |
| 1 |
| 9 |
| 3 |
| 7 |
| 1 |
| 21 |
| 7 |
| 12 |
| 3 |
| 4 |
| 7 |
| 16 |
1×
| 3 |
| 20 |
| 3 |
| 20 |
| 2 |
| 5 |
| 15 |
| 4 |
| 3 |
| 2 |
| 4 |
| 17 |
| 8 |
| 21 |
| 7 |
| 16 |
| 1 |
| 6 |
| 1 |
| 20 |
| 2 |
| 3 |
| 1 |
| 30 |
| 3 |
| 4 |
| 1 |
| 5 |
| 3 |
| 20 |
| 5 |
| 6 |
| 2 |
| 15 |
| 1 |
| 9 |
| 5 |
| 6 |
| 1 |
| 12 |
| 6 |
| 13 |
| 5 |
| 26 |
| 12 |
| 5 |
| 5 |
| 8 |
| 8 |
| 9 |
| 2 |
| 9 |
| 2 |
| 3 |
| 3 |
| 2 |
| 11 |
| 12 |
| 9 |
| 53 |
| 9 |
| 53 |
| 2 |
| 5 |
点评:此题考查了分数的乘法和分数的除法,注意运算法则是解答的关键.
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