问题
解答题
脱式计算,能简便的简便.
|
答案
(1)4.2-1.38+5.8-3.62,
=4.2+5.8-(1.38+3.62),
=10-5,
=5;
(2)0.125×0.25×32,
=(0.125×8)×(0.25×4),
=1×1,
=1;
(3)2÷
-2 3
÷2,2 3
=2×
-3 2
×2 3
,1 2
=3-
,1 3
=2
;2 3
(4)3
×2.65-33 5
+33 5
×8.35,3 5
=3.6×(2.65+8.35-1),
=3.6×10,
=36.