计算:(1)312+(-12)-(-13)+223(2)(-5)×6+(-125)÷(-5)(3)-82+3×(-2)2+(-6)÷(-13)2(4)-2×(-12)2+|-(-2)|3-(-12).

题目简介

计算:(1)312+(-12)-(-13)+223(2)(-5)×6+(-125)÷(-5)(3)-82+3×(-2)2+(-6)÷(-13)2(4)-2×(-12)2+|-(-2)|3-(-12).

题目详情

计算:
(1)3
1
2
+(-
1
2
)-(-
1
3
)+2
2
3

(2)(-5)×6+(-125)÷(-5)
(3)-82+3×(-2)2+(-6)÷(-
1
3
)2

(4)-2×(-
1
2
)2+|-(-2)|3-(-
1
2
)
题型:解答题难度:中档来源:不详

答案

(1)3class="stub"1
2
+(-class="stub"1
2
)-(-class="stub"1
3
)+2class="stub"2
3

=3class="stub"1
2
-class="stub"1
2
+class="stub"1
3
+2class="stub"2
3

=3+3
=6;
(2)(-5)×6+(-125)÷(-5)
=-30+25
=-5;
(3)-82+3×(-2)2+(-6)÷(-class="stub"1
3
)
2

=-64+3×4+(-6)×9
=-64+12-54
=-106;
(4)-2×(-class="stub"1
2
)2+|-(-2)|3-(-class="stub"1
2
)

=-2×class="stub"1
4
+8+class="stub"1
2

=-class="stub"1
2
+8+class="stub"1
2

=8.

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