题目内容
计算下面各题,能简便的要简便.
|
| ||||||||||||||||
62.5%×15+2×
| (
|
(1)
×
÷(
-
)
=
×
÷
,
=
;
(2)
÷
+
×
=
×
+
×
,
=(
+
)×
,
=
×
,
=3
;
(3)62.5%×15+2×
-5÷8
=0.625×15+2×
-
,
=(15+2-1)×
,
=10;
(4)(
+
)÷(8+1÷25%)
=(
+
)÷(8+4),
=(
+
)÷12,
=
÷12,
=
.
| 1 |
| 6 |
| 2 |
| 3 |
| 4 |
| 5 |
| 8 |
| 15 |
=
| 1 |
| 6 |
| 2 |
| 3 |
| 4 |
| 15 |
=
| 5 |
| 12 |
(2)
| 2 |
| 7 |
| 8 |
| 35 |
| 35 |
| 8 |
| 3 |
| 7 |
=
| 2 |
| 7 |
| 35 |
| 8 |
| 35 |
| 8 |
| 3 |
| 7 |
=(
| 2 |
| 7 |
| 3 |
| 7 |
| 35 |
| 8 |
=
| 5 |
| 7 |
| 35 |
| 8 |
=3
| 1 |
| 8 |
(3)62.5%×15+2×
| 5 |
| 8 |
=0.625×15+2×
| 5 |
| 8 |
| 5 |
| 8 |
=(15+2-1)×
| 5 |
| 8 |
=10;
(4)(
| 1 |
| 3 |
| 1 |
| 4 |
=(
| 1 |
| 3 |
| 1 |
| 4 |
=(
| 1 |
| 3 |
| 1 |
| 4 |
=
| 7 |
| 12 |
=
| 7 |
| 144 |
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