题目内容
列式计算.
(1)
加上
乘以
,和是多少?
(2)
与
的和乘以它们的差,积是多少?
(1)
| 3 |
| 4 |
| 1 |
| 6 |
| 3 |
| 8 |
(2)
| 8 |
| 15 |
| 7 |
| 10 |
分析:(1)加数
,加上
乘以
的积,求和是多少,列式
+
×
,
(2)先求出
与
的和于差,再用和乘以差即可.
| 3 |
| 4 |
| 1 |
| 6 |
| 3 |
| 8 |
| 3 |
| 4 |
| 1 |
| 6 |
| 3 |
| 8 |
(2)先求出
| 8 |
| 15 |
| 7 |
| 10 |
解答:解:(1)
+
×
,
=
+
,
=
;
答:和是
.
(2)(
+
)×(
-
),
=
×
,
=
.
答:积是
.
| 3 |
| 4 |
| 1 |
| 6 |
| 3 |
| 8 |
=
| 3 |
| 4 |
| 1 |
| 16 |
=
| 13 |
| 16 |
答:和是
| 13 |
| 16 |
(2)(
| 8 |
| 15 |
| 7 |
| 10 |
| 7 |
| 10 |
| 8 |
| 15 |
=
| 37 |
| 30 |
| 1 |
| 6 |
=
| 37 |
| 180 |
答:积是
| 37 |
| 180 |
点评:根据题意,先弄清运算顺序,然后再列式计算即可.
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