题目内容
| 计算下面各题,能简算的要简算 6.75-(4.2+1.75) | 3.5×(20.6-16.8÷4.8) | [
| ||||||||||||||
| 48.38-21.63-8.37 | (
|
|
解(1)6.75-(4.2+1.75),
=6.75-1.75-4.2,
=0.8;
(2)3.5×(20.6-16.8÷4.8),
=3.5×(20.6-3.5),
=3.5×17.1,
=59.85;
(3)[
-(
-
)]÷
,
=[
-
]÷
,
=
×
,
=
;
(4)48.38-21.63-8.37,
=48.38-(8.37+21.63),
=48.38-30,
=18.38;
(5)(
-
+
)×12,
=
×12-
×12+
×12,
=18-8+3,
=13;
(6)
÷[
-(
+
)],
=
÷[
-
],
=
÷[
-
],
=
÷
,
=
×
,
=4.
=6.75-1.75-4.2,
=0.8;
(2)3.5×(20.6-16.8÷4.8),
=3.5×(20.6-3.5),
=3.5×17.1,
=59.85;
(3)[
| 3 |
| 4 |
| 5 |
| 6 |
| 2 |
| 3 |
| 5 |
| 4 |
=[
| 3 |
| 4 |
| 1 |
| 6 |
| 5 |
| 4 |
=
| 7 |
| 12 |
| 4 |
| 5 |
=
| 7 |
| 15 |
(4)48.38-21.63-8.37,
=48.38-(8.37+21.63),
=48.38-30,
=18.38;
(5)(
| 3 |
| 2 |
| 2 |
| 3 |
| 1 |
| 4 |
=
| 3 |
| 2 |
| 2 |
| 3 |
| 1 |
| 4 |
=18-8+3,
=13;
(6)
| 3 |
| 4 |
| 5 |
| 8 |
| 3 |
| 16 |
| 1 |
| 4 |
=
| 3 |
| 4 |
| 5 |
| 8 |
| 7 |
| 16 |
=
| 3 |
| 4 |
| 10 |
| 16 |
| 7 |
| 16 |
=
| 3 |
| 4 |
| 3 |
| 16 |
=
| 3 |
| 4 |
| 16 |
| 3 |
=4.
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