题目内容
计算各题,能简便运算的写出主要过程.
6.4÷
|
| ||||||||||||
(4-0.4)×(
|
[
|
(1)6.4÷
×
,
=6.4×
×
,
=
;
(2)
×
÷
,
=
×
×
,
=
;
(3)(4-0.4)×(
+
),
=3.6×(
+
),
=3.6×
,
=3.2;
(4)[
-(
+
)]÷
,
=(
-
)×12,
=-
×12,
=-
.
| 8 |
| 9 |
| 5 |
| 24 |
=6.4×
| 9 |
| 8 |
| 5 |
| 24 |
=
| 3 |
| 2 |
(2)
| 5 |
| 42 |
| 24 |
| 25 |
| 36 |
| 35 |
=
| 1 |
| 21 |
| 12 |
| 5 |
| 35 |
| 36 |
=
| 1 |
| 9 |
(3)(4-0.4)×(
| 2 |
| 9 |
| 2 |
| 3 |
=3.6×(
| 2 |
| 9 |
| 6 |
| 9 |
=3.6×
| 8 |
| 9 |
=3.2;
(4)[
| 3 |
| 8 |
| 1 |
| 6 |
| 1 |
| 3 |
| 1 |
| 12 |
=(
| 3 |
| 8 |
| 1 |
| 2 |
=-
| 1 |
| 8 |
=-
| 3 |
| 2 |
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