问题
解答题
计算: (1)-6+15-7+3; (2)60×(
(3)(-2)2×5-(-2)3÷4; (4)
|
答案
(1)原式=18-13=5;
(2)原式=60×
+60×5 6
-60×3 4 7 15
=50+45-28
=67;
(3)原式=4×5-(-8)×1 4
=-20+2
=-18;
(4)原式=2-3+
-13
=
-2.3
计算: (1)-6+15-7+3; (2)60×(
(3)(-2)2×5-(-2)3÷4; (4)
|
(1)原式=18-13=5;
(2)原式=60×
+60×5 6
-60×3 4 7 15
=50+45-28
=67;
(3)原式=4×5-(-8)×1 4
=-20+2
=-18;
(4)原式=2-3+
-13
=
-2.3