题目内容
计算
| 18.76-3.47-0.53 | 0.75+
| ||||||||||||||||||
3
| 3
| 1-
|
(1)
+
-
,
=(
-
)+
,
=
+
,
=
;
(2)18.76-3.47-0.53,
=18.76-(3.47+0.53),
=18.76-4,
=14.76;
(3)0.75+
+
+
,
=(0.75+
)+(
+
),
=(075+0.25)+1,
=1+1,
=2;
(4)3
-
+
,
=(3
+
)-
,
=4-
,
=3
;
(5)3
+
+5
+
,
=(3
+5
)+(
+
),
=9+1,
=10;
(6)1-
-
,
=1-(
+
),
=1-1,
=0.
| 13 |
| 20 |
| 2 |
| 5 |
| 3 |
| 20 |
=(
| 13 |
| 20 |
| 3 |
| 20 |
| 2 |
| 5 |
=
| 1 |
| 2 |
| 2 |
| 5 |
=
| 9 |
| 10 |
(2)18.76-3.47-0.53,
=18.76-(3.47+0.53),
=18.76-4,
=14.76;
(3)0.75+
| 3 |
| 5 |
| 1 |
| 4 |
| 2 |
| 5 |
=(0.75+
| 1 |
| 4 |
| 3 |
| 5 |
| 2 |
| 5 |
=(075+0.25)+1,
=1+1,
=2;
(4)3
| 1 |
| 4 |
| 7 |
| 16 |
| 3 |
| 4 |
=(3
| 1 |
| 4 |
| 3 |
| 4 |
| 7 |
| 16 |
=4-
| 7 |
| 16 |
=3
| 9 |
| 16 |
(5)3
| 1 |
| 6 |
| 7 |
| 8 |
| 5 |
| 6 |
| 1 |
| 8 |
=(3
| 1 |
| 6 |
| 5 |
| 6 |
| 7 |
| 8 |
| 1 |
| 8 |
=9+1,
=10;
(6)1-
| 2 |
| 9 |
| 7 |
| 9 |
=1-(
| 2 |
| 9 |
| 7 |
| 9 |
=1-1,
=0.
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