题目内容
1
|
|
| (
| ||||||||||||
5
| 99×0.25+0.25= | 5.73-1
| 7.2÷100-0.72÷10= | ||||||||||||
| 4.85-
|
(1)1
+0.5,
=1
+
,
=
;
(2)
-0.75,
=0.875-0.75,
=0.125;
(3)
÷4
,
=
×
,
=
;
(4)(
+
)×8,
=
×8+
×8,
=7+6,
=13;
(5)5
+3.42+4
,
=(5
+4
)+3.42,
=10+3.42,
=13.42;
(6)99×0.25+0.25,
=(99+1)×0.25,
=100×0.25,
=25;
(7)5.73-1
+1
,
=5.73+(1
-1
),
=5.73+0,
=5.73;
(8)7.2÷100-0.72÷10,
=0.072-0.072,
=0;
(9)
×0.75+
×
,
=(
+
)×
,
=1×
,
=
;
(10)4.85-
-3
,
=4.85-(
+3
),
=4.85-4,
=0.85.
| 2 |
| 3 |
=1
| 2 |
| 3 |
| 1 |
| 2 |
=
| 13 |
| 6 |
(2)
| 7 |
| 8 |
=0.875-0.75,
=0.125;
(3)
| 5 |
| 21 |
| 1 |
| 5 |
=
| 5 |
| 21 |
| 5 |
| 21 |
=
| 25 |
| 441 |
(4)(
| 7 |
| 8 |
| 3 |
| 4 |
=
| 7 |
| 8 |
| 3 |
| 4 |
=7+6,
=13;
(5)5
| 3 |
| 4 |
| 1 |
| 4 |
=(5
| 3 |
| 4 |
| 1 |
| 4 |
=10+3.42,
=13.42;
(6)99×0.25+0.25,
=(99+1)×0.25,
=100×0.25,
=25;
(7)5.73-1
| 7 |
| 12 |
| 7 |
| 12 |
=5.73+(1
| 7 |
| 12 |
| 7 |
| 12 |
=5.73+0,
=5.73;
(8)7.2÷100-0.72÷10,
=0.072-0.072,
=0;
(9)
| 2 |
| 3 |
| 1 |
| 3 |
| 3 |
| 4 |
=(
| 2 |
| 3 |
| 1 |
| 3 |
| 3 |
| 4 |
=1×
| 3 |
| 4 |
=
| 3 |
| 4 |
(10)4.85-
| 7 |
| 12 |
| 5 |
| 12 |
=4.85-(
| 7 |
| 12 |
| 5 |
| 12 |
=4.85-4,
=0.85.
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