计算下面各题能简便的尽量简便(1)24×(34+56?23)(2)[47×(35?0.25)+310]÷0.5(3)0.374×48+0.62×
计算下面各题能简便的尽量简便(1)24×(34+56?23)(2)[47×(35?0.25)+310]÷0.5(3)0.374×48+0.62×37.4-3.74(4)0...
计算下面各题能简便的尽量简便(1)24×(34+56?23)(2)[47×(35?0.25)+310]÷0.5(3)0.374×48+0.62×37.4-3.74 (4)0.125×34+18×8.25+12.5%(5)2012÷201220122013+12014.
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(1)24×(
+
?
),
=24×
+24×
-24×
,
=18+20-16,
=22;
(2)[
×(
?0.25)+
]÷0.5,
=[
×(
?
)+
],
=
×(
?
)+
,
=
×
+
,
=
+
,
=
;
(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×
+
×8.25+12.5%
=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÷
+
,
=2012÷
+
3 |
4 |
5 |
6 |
2 |
3 |
=24×
3 |
4 |
5 |
6 |
2 |
3 |
=18+20-16,
=22;
(2)[
4 |
7 |
3 |
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 |
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 |
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