问题
解答题
计算下列各题、能简便的要简便计算
|
答案
(1)3.2×1.25+4.8×1
,1 4
=3.2×1.25+4.8×1.25,
=(3.2+4.8)×1.25,
=8×1.25,
=10;
(2)(15-14×
)×4 7
,8 21
=(15-8)×
,8 21
=7×
,8 21
=
;8 3
(3)28.2×44.54+4.454×718,
=28.2×44.54+44.54×71.8,
=(28.2+71.8)×44.54,
=100×44.54,
=4454;
(4)
×8 15
+5 16
÷5 27
,10 9
=
+1 6
,1 6
=
.1 3