A-A+
计算:①8+(-10)+(-2)-(-5);②217-323-513+(-317);③8×(
问题详情
计算:
①8+(-10)+(-2)-(-5);
②2
③8×(-
④18×(-
⑤(
⑥(-
⑦(-
⑧(-1)2008+(-5)×[(-2)3+2]-(-4)2÷(-
参考答案
①原式=8-10-2+5
=13-12
=1;
②原式=217-317-323-513
=-1-9
=-10;
③原式=-8×45×116
=-25;
④原式=-12+(13-4)×23
=-12+9×23
=-12+6
=-6;
⑤原式=-12×36+59×36-712×36
=-18+20-21
=-19;
⑥原式=-34×38×169×18
=-116;
⑦原式=-58×16-0.25×5×64
=-10-80
=-90;
⑧原式=1-5×(-8+2)-16÷(-12)
=1-5×(-6)+32
=1+30+32
=63.
考点: