题目内容
怎样算简便就怎样算.
| 4-
|
| ||||||||||||||||||
36×(
| (15-14×
|
|
(1)
×
÷
=
×
×
,
=
;
(2)4-
-
=4-(
+
),
=4-1,
=3;
(3)
×58+42÷8
=
×58+42×
,
=(58+42)×
,
=100×
,
=12.5;
(4)36×(
+
-
)
=36×
+36×
-36×
,
=24+6-27,
=3;
(5)(15-14×
)×
=(15-8)×
,
=7×
,
=
;
(6)
÷
-
÷
=
×
-
×
,
=(
-
)×
,
=
×
,
=
.
| 4 |
| 9 |
| 1 |
| 5 |
| 4 |
| 5 |
=
| 4 |
| 9 |
| 1 |
| 5 |
| 5 |
| 4 |
=
| 1 |
| 9 |
(2)4-
| 5 |
| 11 |
| 6 |
| 11 |
=4-(
| 5 |
| 11 |
| 6 |
| 11 |
=4-1,
=3;
(3)
| 1 |
| 8 |
=
| 1 |
| 8 |
| 1 |
| 8 |
=(58+42)×
| 1 |
| 8 |
=100×
| 1 |
| 8 |
=12.5;
(4)36×(
| 2 |
| 3 |
| 1 |
| 6 |
| 3 |
| 4 |
=36×
| 2 |
| 3 |
| 1 |
| 6 |
| 3 |
| 4 |
=24+6-27,
=3;
(5)(15-14×
| 4 |
| 7 |
| 8 |
| 21 |
=(15-8)×
| 8 |
| 21 |
=7×
| 8 |
| 21 |
=
| 8 |
| 3 |
(6)
| 4 |
| 5 |
| 5 |
| 8 |
| 1 |
| 2 |
| 5 |
| 8 |
=
| 4 |
| 5 |
| 8 |
| 5 |
| 1 |
| 2 |
| 8 |
| 5 |
=(
| 4 |
| 5 |
| 1 |
| 2 |
| 8 |
| 5 |
=
| 3 |
| 10 |
| 8 |
| 5 |
=
| 12 |
| 25 |
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