耐心算一算(1)(-3)+(-4)-(+11)-(-19);(2)-3.5÷78×(-87)×|-364|;(3)(38-23+12)×(-48);(4)-12-(1-0.5)×13×[2-(-3)2

题目简介

耐心算一算(1)(-3)+(-4)-(+11)-(-19);(2)-3.5÷78×(-87)×|-364|;(3)(38-23+12)×(-48);(4)-12-(1-0.5)×13×[2-(-3)2

题目详情

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].
题型:解答题难度:中档来源:不详

答案

(1)原式=-3-4-11+19
=-18+19
=1;

(2)原式=class="stub"7
2
×class="stub"8
7
×class="stub"8
7
×class="stub"3
64

=class="stub"3
14


(3)原式=-class="stub"3
8
×48+class="stub"2
3
×48-class="stub"1
2
×48
=-18+32-24
=-42+32
=-10;

(4)原式=-1-class="stub"1
2
×class="stub"1
3
×[2-9].
=-1+-class="stub"1
2
×class="stub"1
3
×[-7].
=-1+class="stub"7
6

=class="stub"1
6

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