问题 解答题
细心算一算,一定算对哟!
(1)(1-1
1
2
-
3
8
+
7
12
)×(-24)
(2)-25÷(-4)×(
1
2
)2-12×(-15+24)3
答案

(1)原式=1×(-24)-1

1
2
×(-24)-
3
8
×(-24)
+
7
12
×(-24)

=-24+36+9-14

=-38+45

=7;

(2)原式=-32÷(-4)×

1
4
-12×(-15+16)3

=-32×(-

1
4
1
4
-12×13

=2-12

=-10.

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