问题
解答题
选择合适的方法,计算下面各题.
|
答案
(1)18.7-4.375-6.625,
=18.7-(4.375+6.625),
=18.7-11,
=7.7;
(2)920÷40﹢23×50,
=23+23×50,
=23+1150,
=1173;
(3)12×(
+1 4
-1 6
),1 3
=12×
+12×1 4
-12×1 6
,1 3
=3+2-4,
=1;
(4)4.4×
+3.6÷13 4
+0.75×2,1 3
=4.4×
+3.6×3 4
+3 4
×2,3 4
=
×(4.4+3.6+2),3 4
=
×10,3 4
=
.15 2