问题
解答题
计算下面各题能简便的尽量简便 (1)24×(
(2)[
(3)0.374×48+0.62×37.4-3.74 (4)0.125×
(5)2012÷2012
|
答案
(1)24×(
+3 4
-5 6
),2 3
=24×
+24×3 4
-24×5 6
,2 3
=18+20-16,
=22;
(2)[
×(4 7
-0.25)+3 5
]÷0.5,3 10
=[
×(4 7
-3 5
)+1 4
],3 10
=
×(4 7
-12 20
)+5 20
,3 10
=
×4 7
+7 20
,3 10
=
+2 10
,3 10
=
;1 2
(3)0.374×48+0.62×37.4-3.74,
=0.374×48+62×0.374-0.374×10,
=0.374×(48+62-10),
=0.374×100,
=37.4;
(4)0.125×
+3 4
×8.25+12.5%1 8
=0.125×0.75+0.125×8.25+0.125,
=0.125×(0.75+8.25+1),
=0.125×10,
=1.25;
(5)2012÷2012
+2012 2013
,1 2014
=2012÷
+2012×2013+2012 2013
,1 2014
=2012÷
+2012×(2013+1) 2013
,1 2014
=2012×
+2013 2012×2014
,1 2014
=
+2013 2014
,1 2014
=1.