问题
解答题
仔细算一算: (1)-20+(-14)-(-18) (2)3-(-2)2÷(-3)×9 (3)-
(4)4-(-36)×(
|
答案
(1)原式=-20-14+18
=-34+18
=-16;
(2)原式=3-4×(-
)×91 3
=3+12
=15;
(3)原式=-3+4-1
=0;
(4)原式=4+36×
+36×1 6
-36×5 9 7 12
=4+6+20-21
=9.
仔细算一算: (1)-20+(-14)-(-18) (2)3-(-2)2÷(-3)×9 (3)-
(4)4-(-36)×(
|
(1)原式=-20-14+18
=-34+18
=-16;
(2)原式=3-4×(-
)×91 3
=3+12
=15;
(3)原式=-3+4-1
=0;
(4)原式=4+36×
+36×1 6
-36×5 9 7 12
=4+6+20-21
=9.