题目内容
列式计算
(1)
加上
除
,和是多少?
(2)
加上
除以
的商,所得的和乘
,积是多少?
(1)
| 5 |
| 8 |
| 3 |
| 4 |
| 1 |
| 8 |
(2)
| 2 |
| 3 |
| 1 |
| 4 |
| 3 |
| 4 |
| 2 |
| 7 |
考点:分数的四则混合运算
专题:文字叙述题
分析:(1)
除
的商是
÷
,则
加上
除
,和是
+
÷
.
(2)
除以
的商是
÷
,则
加上
除以
的商,所得的和是
+
÷
,所以它们的和乘
的积是:(
+
÷
)×
.
| 3 |
| 4 |
| 1 |
| 8 |
| 1 |
| 8 |
| 3 |
| 4 |
| 5 |
| 8 |
| 3 |
| 4 |
| 1 |
| 8 |
| 5 |
| 8 |
| 1 |
| 8 |
| 3 |
| 4 |
(2)
| 1 |
| 4 |
| 3 |
| 4 |
| 1 |
| 4 |
| 3 |
| 4 |
| 2 |
| 3 |
| 1 |
| 4 |
| 3 |
| 4 |
| 2 |
| 3 |
| 1 |
| 4 |
| 3 |
| 4 |
| 2 |
| 7 |
| 2 |
| 3 |
| 1 |
| 4 |
| 3 |
| 4 |
| 2 |
| 7 |
解答:
解:(1)
+
÷
=
+
=
答:和是
.
(2)(
+
÷
)×
=(
+
)×
=1×
=
答:积是
.
| 5 |
| 8 |
| 1 |
| 8 |
| 3 |
| 4 |
=
| 5 |
| 8 |
| 1 |
| 6 |
=
| 19 |
| 24 |
答:和是
| 19 |
| 24 |
(2)(
| 2 |
| 3 |
| 1 |
| 4 |
| 3 |
| 4 |
| 2 |
| 7 |
=(
| 2 |
| 3 |
| 1 |
| 3 |
| 2 |
| 7 |
=1×
| 2 |
| 7 |
=
| 2 |
| 7 |
答:积是
| 2 |
| 7 |
点评:完成本题要注意除法中“除与除以”的区别.
练习册系列答案
相关题目