问题
解答题
下面各题,怎样简便就怎样算,写出主要过程. (3618÷18-145)×29 36×(
3.4-5.8+7.6-2.2 (0.8+
|
答案
(1)(3618÷18-145)×29,
=(201-145)×29,
=56×29,
=1624;
(2)36×(
-11 12
),7 9
=36×
-36×11 12
,7 9
=33-28,
=5;
(3)3.4-5.8+7.6-2.2,
=(3.4+7.6)-(5.8+2.2),
=11-8,
=3;
(4)(0.8+
)÷1 4
+0.25,3 5
=1.05÷0.6+0.25,
=1.75+0.25,
=2.