题目内容
填空.
×2=
+
=
×3=0.8×
+
+
=
×
=()×()=().
| 4 |
| 7 |
| 4 |
| 7 |
| 4 |
| 7 |
| 4 |
| 7 |
| 4 |
| 7 |
| 8 |
| 7 |
| 8 |
| 7 |
| 4 |
| 5 |
3
3
=2.4
2.4
| 3 |
| 10 |
| 3 |
| 10 |
| 3 |
| 10 |
| 3 |
| 10 |
| 3 |
| 10 |
3
3
=| 9 |
| 10 |
| 9 |
| 10 |
| ||||||||
100个
|
分析:(1)(3)(4)根据分数乘法的意义进行求解;
(2)先把分数化成小数再计算.
(2)先把分数化成小数再计算.
解答:解:(1)
×2=
+
=
;
(2)
×3=0.8×3=2.4;
(3)
+
+
=
×3=
;
(4)
=
×100=25.
故答案为:
,
,
,3,2.4,
,3,
,
,100,25.
| 4 |
| 7 |
| 4 |
| 7 |
| 4 |
| 7 |
| 8 |
| 7 |
(2)
| 4 |
| 5 |
(3)
| 3 |
| 10 |
| 3 |
| 10 |
| 3 |
| 10 |
| 3 |
| 10 |
| 9 |
| 10 |
(4)
| ||||||||
100个
|
| 1 |
| 4 |
故答案为:
| 4 |
| 7 |
| 4 |
| 7 |
| 8 |
| 7 |
| 3 |
| 10 |
| 9 |
| 10 |
| 1 |
| 4 |
点评:本题主要考查了分数乘整数的意义;求几个相同加数和的简便运算.
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