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耐心算一算(1)(-3)+(-4)-(11)-(-19);(2)-3.5÷78×(-87)×

2022-08-15 16:05:49 问答库 阅读 206 次

问题详情

耐心算一算
(1)(-3)+(-4)-(11)-(-19);
(2)-3.5÷7

8

×(-8

7

)×|-3

64

|;
(3)(3

8

-2

3

+1

2

)×(-48);
(4)-12-(1-0.5)×1

3

×[2-(-3)2].

参考答案

(1)原式=-3-4-11+19
=-18+19
=1;

(2)原式=72×87×87×364
=314;

(3)原式=-38×48+23×48-12×48
=-18+32-24
=-42+32
=-10;

(4)原式=-1-12×13×[2-9].
=-1+-12×13×[-7].
=-1+76
=16.

考点: