题目内容
计算:
(1)(-2)2×5-(-2)3÷4;
(2)6+(-
)-2-(-1.5).
(1)(-2)2×5-(-2)3÷4;
(2)6+(-
| 1 |
| 5 |
(1)(-2)2×5-(-2)3÷4
=4×5+8÷4
=20+2
=22;
(2)6+(-
)-2-(-1.5)
=6-
-2+1.5
=7.5-2.2
=5.3.
=4×5+8÷4
=20+2
=22;
(2)6+(-
| 1 |
| 5 |
=6-
| 1 |
| 5 |
=7.5-2.2
=5.3.
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