题目内容
计算下面各题,能简便的要简便.
+
+
+
+
4-
-
78-8.5+22-0.5
-(
+
)
-
+
+
.
| 5 |
| 6 |
| 2 |
| 7 |
| 1 |
| 6 |
| 5 |
| 8 |
| 2 |
| 3 |
| 5 |
| 6 |
4-
| 4 |
| 5 |
| 1 |
| 5 |
78-8.5+22-0.5
| 4 |
| 5 |
| 1 |
| 2 |
| 1 |
| 4 |
| 3 |
| 4 |
| 2 |
| 7 |
| 1 |
| 4 |
| 2 |
| 7 |
(1)
+
+
=(
+
)+
,
=1
;
(2)
+
+
=
+
+
,
=
;
(3)4-
-
=4-(
+
),
=4-1,
=3;
(4)78-8.5+22-0.5
=(78+22)-(8.5+0.5),
=100-9,
=91;
(5)
-(
+
)
=
-
,
=
;
(6)
-
+
+
=(
+
)+(
-
),
=1+0,
=1.
| 5 |
| 6 |
| 2 |
| 7 |
| 1 |
| 6 |
=(
| 5 |
| 6 |
| 1 |
| 6 |
| 2 |
| 7 |
=1
| 2 |
| 7 |
(2)
| 5 |
| 8 |
| 2 |
| 3 |
| 5 |
| 6 |
=
| 15 |
| 24 |
| 16 |
| 24 |
| 20 |
| 24 |
=
| 17 |
| 8 |
(3)4-
| 4 |
| 5 |
| 1 |
| 5 |
=4-(
| 4 |
| 5 |
| 1 |
| 5 |
=4-1,
=3;
(4)78-8.5+22-0.5
=(78+22)-(8.5+0.5),
=100-9,
=91;
(5)
| 4 |
| 5 |
| 1 |
| 2 |
| 1 |
| 4 |
=
| 4 |
| 5 |
| 3 |
| 4 |
=
| 1 |
| 20 |
(6)
| 3 |
| 4 |
| 2 |
| 7 |
| 1 |
| 4 |
| 2 |
| 7 |
=(
| 3 |
| 4 |
| 1 |
| 4 |
| 2 |
| 7 |
| 2 |
| 7 |
=1+0,
=1.
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