题目内容
合理计算:
1.05+1.42÷(4.3+2.8)
8.4×
+1.6×0.25
-
÷
+
(
-
×
)÷
5-
÷
-
[
-(
-
)]÷
.
1.05+1.42÷(4.3+2.8)
8.4×
| 1 |
| 4 |
| 2 |
| 3 |
| 3 |
| 8 |
| 9 |
| 10 |
| 1 |
| 4 |
(
| 14 |
| 15 |
| 14 |
| 15 |
| 3 |
| 8 |
| 5 |
| 9 |
5-
| 6 |
| 13 |
| 9 |
| 26 |
| 4 |
| 3 |
[
| 1 |
| 2 |
| 3 |
| 4 |
| 3 |
| 5 |
| 7 |
| 10 |
1.05+1.42÷(4.3+2.8),
=1.05+1.42÷7.1,
=1.05+0.2,
=1.25;
8.4×
+1.6×0.25,
=8.4×0.25+1.6×0.25,
=(8.4+1.6)×0.25,
=10×0.25,
=2.5;
-
÷
+
,
=
-
×
+
,
=
-
+
,
=
-
+
,
=
;
(
-
×
)÷
,
=(1-
)×
×
,
=
×
×
,
=1
;
5-
÷
-
,
=5-
×
-
,
=5-
-
,
=5-(
+
),
=5-
,
=2
;
[
-(
-
)]÷
,
=[
-
]÷
,
=
×
,
=
.
=1.05+1.42÷7.1,
=1.05+0.2,
=1.25;
8.4×
| 1 |
| 4 |
=8.4×0.25+1.6×0.25,
=(8.4+1.6)×0.25,
=10×0.25,
=2.5;
| 2 |
| 3 |
| 3 |
| 8 |
| 9 |
| 10 |
| 1 |
| 4 |
=
| 2 |
| 3 |
| 3 |
| 8 |
| 10 |
| 9 |
| 1 |
| 4 |
=
| 2 |
| 3 |
| 5 |
| 12 |
| 1 |
| 4 |
=
| 8 |
| 12 |
| 5 |
| 12 |
| 3 |
| 12 |
=
| 1 |
| 2 |
(
| 14 |
| 15 |
| 14 |
| 15 |
| 3 |
| 8 |
| 5 |
| 9 |
=(1-
| 3 |
| 8 |
| 14 |
| 15 |
| 9 |
| 5 |
=
| 5 |
| 8 |
| 14 |
| 15 |
| 9 |
| 5 |
=1
| 1 |
| 20 |
5-
| 6 |
| 13 |
| 9 |
| 26 |
| 4 |
| 3 |
=5-
| 6 |
| 13 |
| 26 |
| 9 |
| 4 |
| 3 |
=5-
| 4 |
| 3 |
| 4 |
| 3 |
=5-(
| 4 |
| 3 |
| 4 |
| 3 |
=5-
| 8 |
| 3 |
=2
| 1 |
| 3 |
[
| 1 |
| 2 |
| 3 |
| 4 |
| 3 |
| 5 |
| 7 |
| 10 |
=[
| 1 |
| 2 |
| 3 |
| 20 |
| 7 |
| 10 |
=
| 7 |
| 20 |
| 10 |
| 7 |
=
| 1 |
| 2 |
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