题目内容
5-2
| (12.5+
| 19-3
| 8+0.1÷0.1-8= | ||||||||||
| 21-2.897= | 0.25×0.12= | 3.6÷25%×4= |
|
(1)5-2
+
,
=2
+
,
=3
;
(2)(12.5+
)×8,
=12.5×8+
×8,
=100+6,
=106;
(3)19-3
-4
,
=19-(3
+4
),
=19-8,
=11;
(4)8+0.1÷0.1-8,
=8+1-8,
=1;
(5)21-2.897,
=21-3+0.103,
=18+0.103,
=18.103;
(6)0.25×0.12,
=0.25×(4×0.03),
=(0.25×4)×0.03,
=1×0.03,
=0.03;
(7)3.6÷25%×4,
=14.4×4,
=57.6;
(8)
÷(
+
),
=
÷
,
=
.
| 1 |
| 3 |
| 2 |
| 3 |
=2
| 2 |
| 3 |
| 2 |
| 3 |
=3
| 1 |
| 3 |
(2)(12.5+
| 3 |
| 4 |
=12.5×8+
| 3 |
| 4 |
=100+6,
=106;
(3)19-3
| 4 |
| 9 |
| 5 |
| 9 |
=19-(3
| 4 |
| 9 |
| 5 |
| 9 |
=19-8,
=11;
(4)8+0.1÷0.1-8,
=8+1-8,
=1;
(5)21-2.897,
=21-3+0.103,
=18+0.103,
=18.103;
(6)0.25×0.12,
=0.25×(4×0.03),
=(0.25×4)×0.03,
=1×0.03,
=0.03;
(7)3.6÷25%×4,
=14.4×4,
=57.6;
(8)
| 1 |
| 12 |
| 1 |
| 2 |
| 1 |
| 3 |
=
| 1 |
| 12 |
| 5 |
| 6 |
=
| 1 |
| 10 |
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