题目内容
列式计算:
(1)
与
的和的
是多少?
(2)
加上
的
,和是多少?
(3)
与
的差乘它们的和积是多少?
(4)9与它的倒数的和乘
,积是多少?
(1)
| 3 |
| 4 |
| 1 |
| 6 |
| 1 |
| 11 |
(2)
| 3 |
| 4 |
| 1 |
| 6 |
| 1 |
| 11 |
(3)
| 1 |
| 3 |
| 1 |
| 4 |
(4)9与它的倒数的和乘
| 7 |
| 9 |
考点:分数的四则混合运算
专题:文字叙述题
分析:(1)先算
与
的和,所得的和再乘
;
(2)先算
的
的积,再用
加上所得的积;
(3)先算
与
的差,
与
的和,所得的差乘所得的和;
(4)先算9的倒数是1÷9,再用9加上所得的商,所得的和乘
.
| 3 |
| 4 |
| 1 |
| 6 |
| 1 |
| 11 |
(2)先算
| 1 |
| 6 |
| 1 |
| 11 |
| 3 |
| 4 |
(3)先算
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 3 |
| 1 |
| 4 |
(4)先算9的倒数是1÷9,再用9加上所得的商,所得的和乘
| 7 |
| 9 |
解答:
解:(1))(
+
)×
=
×
=
.
答:是
.
(2)
+
×
=
+
=
.
答:和是
.
(3)(
-
)×(
+
)
=
×
=
.
答:积是
.
(4)(9+1÷9)×
=(9+
)×
=9×
+
×
=7+
=7
.
答:积是7
.
| 3 |
| 4 |
| 1 |
| 6 |
| 1 |
| 11 |
=
| 11 |
| 12 |
| 1 |
| 11 |
=
| 1 |
| 12 |
答:是
| 1 |
| 12 |
(2)
| 3 |
| 4 |
| 1 |
| 6 |
| 1 |
| 11 |
=
| 3 |
| 4 |
| 1 |
| 66 |
=
| 101 |
| 132 |
答:和是
| 101 |
| 132 |
(3)(
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 3 |
| 1 |
| 4 |
=
| 1 |
| 12 |
| 7 |
| 12 |
=
| 7 |
| 144 |
答:积是
| 7 |
| 144 |
(4)(9+1÷9)×
| 7 |
| 9 |
=(9+
| 1 |
| 9 |
| 7 |
| 9 |
=9×
| 7 |
| 9 |
| 1 |
| 9 |
| 7 |
| 9 |
=7+
| 7 |
| 81 |
=7
| 7 |
| 81 |
答:积是7
| 7 |
| 81 |
点评:根据题意,先弄清运算顺序,然后再列式解答.
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