题目内容
| 计算(能够简算的要简算) 5400-2940÷28 | 389×42.7+389×57.3 | (
| |||||||||||
1÷(0.75+
|
|
(1)5400-2940÷28,
=5400-105,
=5400-(100+5),
=5400-100-5,
=5295;
(2)389×42.7+389×57.3,
=389×(42.7+57.3),
=389×100,
=38900;
(3)(
+
)÷4+
,
=
×
+
,
=
+
,
=
;
(4)1÷(0.75+
)×
,
=1÷(
+
)×
,
=1÷
×
,
=
×
,
=
;
(5)
+
+
+
,
=(
+
)+(
+
),
=1+1,
=2.
=5400-105,
=5400-(100+5),
=5400-100-5,
=5295;
(2)389×42.7+389×57.3,
=389×(42.7+57.3),
=389×100,
=38900;
(3)(
| 1 |
| 9 |
| 1 |
| 27 |
| 23 |
| 27 |
=
| 4 |
| 27 |
| 1 |
| 4 |
| 23 |
| 27 |
=
| 1 |
| 27 |
| 23 |
| 27 |
=
| 8 |
| 9 |
(4)1÷(0.75+
| 1 |
| 3 |
| 13 |
| 24 |
=1÷(
| 3 |
| 4 |
| 1 |
| 3 |
| 13 |
| 24 |
=1÷
| 13 |
| 12 |
| 13 |
| 24 |
=
| 12 |
| 13 |
| 13 |
| 24 |
=
| 1 |
| 2 |
(5)
| 1 |
| 3 |
| 3 |
| 8 |
| 2 |
| 3 |
| 5 |
| 8 |
=(
| 1 |
| 3 |
| 2 |
| 3 |
| 3 |
| 8 |
| 5 |
| 8 |
=1+1,
=2.
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