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+0.62×3
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)15÷[(23+15)×113].
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(1)24×(
+
?
),
=24×
+24×
-24×
,
=18+20-16,
=38-16,
=22;
(2)[
×(
?0.25)+
]÷0.5,
=[
×
+
]÷0.5,
=[
+
]÷0.5,
=
÷0.5,
=1;
(3)0.374×48+0.62×37.4-3.74,
=3.74×4.8+6.2×3.74-3.74×1,
=3.74×(4.8+6.2-1),
=3.74×10,
=37.4;
(4)0.125×
+
×8.25+12.5%,
=0.125×(0.75+8.25+1),
=0.125×10,
=12.5;
(5)
÷[(
+
)×
],
=
÷[
×
],
=
÷
,
=3.
3 |
4 |
5 |
6 |
2 |
3 |
=24×
3 |
4 |
5 |
6 |
2 |
3 |
=18+20-16,
=38-16,
=22;
(2)[
4 |
7 |
3 |
5 |
3 |
10 |
=[
4 |
7 |
7 |
20 |
3 |
10 |
=[
2 |
10 |
3 |
10 |
=
1 |
2 |
=1;
(3)0.374×48+0.62×37.4-3.74,
=3.74×4.8+6.2×3.74-3.74×1,
=3.74×(4.8+6.2-1),
=3.74×10,
=37.4;
(4)0.125×
3 |
4 |
1 |
8 |
=0.125×(0.75+8.25+1),
=0.125×10,
=12.5;
(5)
1 |
5 |
2 |
3 |
1 |
5 |
1 |
13 |
=
1 |
5 |
13 |
15 |
1 |
13 |
=
1 |
5 |
1 |
15 |
=3.
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