问题
解答题
计算: ①8+(-10)+(-2)-(-5) ②(-5)÷(-
③-36÷(-6)-72÷(-8) ④8×(-
⑤(-24)×(-
⑥(-
⑦18×(-
⑧-32-[1-(-2)3]÷(-3) |
答案
①8+(-10)+(-2)-(-5)
=8-10-2+5
=1;
②(-5)÷(-
)=4;5 4
③-36÷(-6)-72÷(-8)
=6+9
=15;
④8×(-
)÷|-16|4 5
=8×(-
)÷164 5
=-10÷16
=-
;5 8
⑤(-24)×(-
+1 2
-3 4
)1 3
=12-18+8
=2;
⑥(-
)+(-1 2
)-(-13 4
)+(+1.5)3 4
=(-
+1.5)+(-1 2
+13 4
)3 4
=1+1
=2;
⑦18×(-
)+13×2 3
-4×2 3 2 3
=(-18+13-4)×2 3
=-9×2 3
=-6;
⑧-32-[1-(-2)3]÷(-3)
=-9-[1+8]÷(-3)
=-9-9÷(-3)
=-9+3
=-6.