问题
解答题
计算 (1)-20+(-14)-(-18)-13 (2)1-
(3)2
(4))10+(-2)2×(-5) (5)(-25)÷
(6)(-24)×(
|
答案
(1)-20+(-14)-(-18)-13
=-20-14+18-13
=-29;
(2)1-
+4 7
-1 5
+3 7 9 5
=1-(
+4 7
)+(3 7
+1 5
)9 5
=1-1+2
=2;
(3)2
×(-36)8 9
=(3-
)×(-36)1 9
=3×(-36)-
×(-36)1 9
=-108+4
=-104;
(4))10+(-2)2×(-5)
=10+4×(-5)
=10-20
=-10;
(5)(-25)÷
×5 4
÷(-16)4 5
=25×
×4 5
×4 5 1 16
=1;
(6)(-24)×(
-1 6
+1 4
)1 2
=-24×
+24×1 6
-24×1 4 1 2
=-4+6-12
=-10.