题目内容
列式计算.
(1)2.5与
的和除它们的差,结果是多少?
(2)一个数的
与它的40%D的和是52,这个数是多少?
(1)2.5与
| 3 |
| 4 |
(2)一个数的
| 1 |
| 2 |
(1)(2.5-
)÷(2.5+
),
=(
-
)÷(
+
),
=
÷
,
=
×
,
=
;
答:结果是
.
(2)52÷(
+40%),
=52÷(
+
),
=52÷
,
=52×
,
=
;
答:这个数是
.
| 3 |
| 4 |
| 3 |
| 4 |
=(
| 5 |
| 2 |
| 3 |
| 4 |
| 5 |
| 2 |
| 3 |
| 4 |
=
| 7 |
| 4 |
| 13 |
| 4 |
=
| 7 |
| 4 |
| 4 |
| 13 |
=
| 7 |
| 13 |
答:结果是
| 7 |
| 13 |
(2)52÷(
| 1 |
| 2 |
=52÷(
| 1 |
| 2 |
| 2 |
| 5 |
=52÷
| 9 |
| 10 |
=52×
| 10 |
| 9 |
=
| 520 |
| 9 |
答:这个数是
| 520 |
| 9 |
练习册系列答案
相关题目