计算(1)(-4)-(+8)-(-5)+(-9);(2)(-5)×(-7)-5×(-6)(3)(-9)÷32×23÷(-4)(4)(1-12-13)×(-12)(5)3+50÷(-2)2×(-15)-

题目简介

计算(1)(-4)-(+8)-(-5)+(-9);(2)(-5)×(-7)-5×(-6)(3)(-9)÷32×23÷(-4)(4)(1-12-13)×(-12)(5)3+50÷(-2)2×(-15)-

题目详情

计算
(1)(-4)-(+8)-(-5)+(-9);
(2)(-5)×(-7)-5×(-6)
(3)(-9)÷
3
2
×
2
3
÷(-4)

(4)(1-
1
2
-
1
3
)×(-12)

(5)3+50÷(-2)2×(-
1
5
)-1
题型:解答题难度:中档来源:不详

答案

(1)原式=-4-8+5-9
=-12+5-9
=-7-9
=-16;

(2)原式=35+30
=65;

(3)原式=(-9)×class="stub"2
3
×class="stub"2
3
×(-class="stub"1
4

=(-6)×class="stub"2
3
×(-class="stub"1
4

=(-4)×(-class="stub"1
4

=1;

(4)原式=1×(-12)-class="stub"1
2
×(-12)-class="stub"1
3
×(-12)
=-12+6+4
=-2;

(5)原式=3+50÷4×(-class="stub"1
5
)-1
=3+50×class="stub"1
4
×(-class="stub"1
5
)-1
=3+class="stub"25
2
×(-class="stub"1
5
)-1
=3-class="stub"5
2
-1
=-class="stub"1
2

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