问题
解答题
细心算一算 (1)11+(-22)-3×(-11); (2)(-1
(3)(-2
(4)(-5)×(-7)-5×(-6); (5)-22×(-
(6)-|5|+(-3)3÷(-22); (7)(
(8)[(-3)2-(-5)2]÷(-2). |
答案
(1)原式=11-22+33=-11+33=22;
(2)原式=-
×3 2
×3 4
=-4 9
;1 2
(3)原式=-2
+1 2
-5 6
+1 2
=-21 6
-1 2
+1 2
+5 6
=-3+1=-2;1 6
(4)原式=35+30=65;
(5)原式=4×
+8÷4=2+2=4;1 2
(6)原式=-5-27÷4=-5-
=-27 4
;47 4
(7)原式=
×24+5 12
×24-2 3
×24=10+16-18=-2;3 4
(8)原式=(9-25)÷(-2)=-16÷(-2)=8.