题目内容
计算
(1)(+18)+(-12);
(2)
+
-
-1
;
(3)(
-
-
)×48;
(4)|-1.5|-(-3.6)+|+1.4|-4.5.
(1)(+18)+(-12);
(2)
1 |
2 |
2 |
3 |
1 |
2 |
2 |
3 |
(3)(
2 |
3 |
1 |
4 |
3 |
8 |
(4)|-1.5|-(-3.6)+|+1.4|-4.5.
(1)原式=18-12=6;
(2)原式=(
-
)+(
-1
)=0-1=-1;
(3)原式=32-12-18=32-30=2;
(4)原式=1.5+3.6+1.4-4.5=6.5-4.5=2.
(2)原式=(
1 |
2 |
1 |
2 |
2 |
3 |
2 |
3 |
(3)原式=32-12-18=32-30=2;
(4)原式=1.5+3.6+1.4-4.5=6.5-4.5=2.
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