题目内容
简便计算.
(1)
×
+
÷31
(2)48×(
+
-
)
(3)
×37%+
×37%
(1)
| 7 |
| 41 |
| 1 |
| 31 |
| 34 |
| 41 |
(2)48×(
| 1 |
| 8 |
| 1 |
| 6 |
| 1 |
| 12 |
(3)
| 1 |
| 5 |
| 4 |
| 5 |
(1)
×
+
÷31,
=
×
+
×
,
=(
+
)×
,
=1×
,
=
;
(2)48×(
+
-
),
=48×
+48×
-48×
,
=6+8-4,
=10;
(3)
×37%+
×37%,
=
×0.37+
×0.37,
=(
+
)×0.37,
=1×0.37,
=0.37.
| 7 |
| 41 |
| 1 |
| 31 |
| 34 |
| 41 |
=
| 7 |
| 41 |
| 1 |
| 31 |
| 34 |
| 41 |
| 1 |
| 31 |
=(
| 7 |
| 41 |
| 34 |
| 41 |
| 1 |
| 31 |
=1×
| 1 |
| 31 |
=
| 1 |
| 31 |
(2)48×(
| 1 |
| 8 |
| 1 |
| 6 |
| 1 |
| 12 |
=48×
| 1 |
| 8 |
| 1 |
| 6 |
| 1 |
| 12 |
=6+8-4,
=10;
(3)
| 1 |
| 5 |
| 4 |
| 5 |
=
| 1 |
| 5 |
| 4 |
| 5 |
=(
| 1 |
| 5 |
| 4 |
| 5 |
=1×0.37,
=0.37.
练习册系列答案
相关题目