计算:①8+(-10)+(-2)-(-5);②217-323-513+(-317);③8×(-45)÷|-16|;④18×(-23)+13×23-4×23;⑤(12-59+712)×(-36);⑥(-

题目简介

计算:①8+(-10)+(-2)-(-5);②217-323-513+(-317);③8×(-45)÷|-16|;④18×(-23)+13×23-4×23;⑤(12-59+712)×(-36);⑥(-

题目详情

计算:
①8+(-10)+(-2)-(-5);
②2
1
7
-3
2
3
-5
1
3
+(-3
1
7
);
③8×(-
4
5
)÷|-16|;
④18×(-
2
3
)+13×
2
3
-4×
2
3

⑤(
1
2
-
5
9
+
7
12
)×(-36);
⑥(-
3
4
)×
3
8
÷(-
9
16
)×(-
1
8
);
(-
5
8
)×(-4)2-0.25×(-5)×(-4)3

⑧(-1)2008+(-5)×[(-2)3+2]-(-4)2÷(-
1
2
).
题型:解答题难度:中档来源:不详

答案

①原式=8-10-2+5
=13-12
=1;

②原式=2class="stub"1
7
-3class="stub"1
7
-3class="stub"2
3
-5class="stub"1
3

=-1-9
=-10;

③原式=-8×class="stub"4
5
×class="stub"1
16

=-class="stub"2
5


④原式=-12+(13-4)×class="stub"2
3

=-12+9×class="stub"2
3

=-12+6
=-6;

⑤原式=-class="stub"1
2
×36+class="stub"5
9
×36-class="stub"7
12
×36
=-18+20-21
=-19;

⑥原式=-class="stub"3
4
×class="stub"3
8
×class="stub"16
9
×class="stub"1
8

=-class="stub"1
16


⑦原式=-class="stub"5
8
×16-0.25×5×64
=-10-80
=-90;

⑧原式=1-5×(-8+2)-16÷(-class="stub"1
2

=1-5×(-6)+32
=1+30+32
=63.

更多内容推荐