题目内容
计算,能简便的用简便方法算.
|
| ||||||||||
| 9.75-(2.75+3.38)-2.62. |
(1)
÷24-
×
,
=
×
-
×
,
=(
-
)×
,
=
×
,
=
;
(2)
×13+8÷
,
=
×13+8×
,
=
×(13+8),
=
×21,
=17;
(3)
÷[
-(
+
)],
=
÷[
-
],
=
÷
,
=
;
(4)9.75-(2.75+3.38)-2.62,
=9.75-2.75-3.38-2.62,
=(9.75-2.75)-(3.38+2.62),
=7-6,
=1.
| 8 |
| 13 |
| 1 |
| 24 |
| 5 |
| 13 |
=
| 8 |
| 13 |
| 1 |
| 24 |
| 1 |
| 24 |
| 5 |
| 13 |
=(
| 8 |
| 13 |
| 5 |
| 13 |
| 1 |
| 24 |
=
| 3 |
| 13 |
| 1 |
| 24 |
=
| 1 |
| 104 |
(2)
| 17 |
| 21 |
| 21 |
| 17 |
=
| 17 |
| 21 |
| 17 |
| 21 |
=
| 17 |
| 21 |
=
| 17 |
| 21 |
=17;
(3)
| 5 |
| 18 |
| 5 |
| 6 |
| 3 |
| 8 |
| 1 |
| 4 |
=
| 5 |
| 18 |
| 5 |
| 6 |
| 5 |
| 8 |
=
| 5 |
| 18 |
| 5 |
| 24 |
=
| 4 |
| 3 |
(4)9.75-(2.75+3.38)-2.62,
=9.75-2.75-3.38-2.62,
=(9.75-2.75)-(3.38+2.62),
=7-6,
=1.
练习册系列答案
相关题目