题目内容
口算.
6×
=
×
=
×39=
-
=
15÷
=
÷4=
÷
=
0÷
=
+
=
4-2
=
×4=
×2=
6×
| 11 |
| 12 |
| 5 |
| 8 |
| 4 |
| 15 |
| 4 |
| 13 |
| 5 |
| 6 |
| 1 |
| 2 |
15÷
| 10 |
| 13 |
| 8 |
| 9 |
| 3 |
| 10 |
| 14 |
| 15 |
0÷
| 8 |
| 15 |
| 1 |
| 3 |
| 3 |
| 4 |
4-2
| 1 |
| 5 |
| 2 |
| 9 |
| 5 |
| 16 |
分析:第1、2、3、11、12题属于分数的乘法,注意约分;第4、9、10题属于分数的加、减运算,注意通分;第5、6、7题属于分数除法,在计算时,把除法改为乘法再计算;第8题根据“0乘以任何数都得0”,直接写出结果.
解答:解:6×
=5.5;
×
=
;
×39=12;
-
=
; 15÷
=
;
÷4=
;
÷
=
; 0÷
=0;
+
=
; 4-2
=1
;
×4=
;
×2=
.
| 11 |
| 12 |
| 5 |
| 8 |
| 4 |
| 15 |
| 1 |
| 6 |
| 4 |
| 13 |
| 5 |
| 6 |
| 1 |
| 2 |
| 1 |
| 3 |
| 10 |
| 13 |
| 39 |
| 2 |
| 8 |
| 9 |
| 2 |
| 9 |
| 3 |
| 10 |
| 14 |
| 15 |
| 9 |
| 28 |
| 8 |
| 15 |
| 1 |
| 3 |
| 3 |
| 4 |
| 13 |
| 12 |
| 1 |
| 5 |
| 4 |
| 5 |
| 2 |
| 9 |
| 8 |
| 9 |
| 5 |
| 16 |
| 5 |
| 8 |
点评:此题考查了分数的加、减、乘、除运算,注意约分与通分,以及0在运算中的特殊作用.
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