问题
解答题
用你喜欢的方法计算. (1)230-2.6×1.5 (2)36×(
(3)2÷
(4)42÷[14-(50-39)]. |
答案
(1)230-2.6×1.5,
=230-3.9,
=226.1;
(2)36×(
+2 9
),7 12
=36×
+2 9
×36,7 12
=8+21,
=29;
(3)2÷
-2 3
÷2,2 3
=3-
,1 3
=2
;2 3
(4)42÷[14-(50-39)],
=42÷[14-11],
=42÷3,
=14.