1楼:威尔
(1)2.5×
(6+5×du3.2)
=2.5×zhi(dao6+16)
=2.5×内22
=55;
(2)45×7.3+27×4.5
=45×7.3+2.7×45
=45×(7.3+2.7)
=45×10
=450;
(3)5.8×101-5.8
=5.8×(101-1)
=5.8×100
=580;
(4)0.125×3.2×25
=0.125×(8×0.4)×
容25=(0.125×8)×(0.4×25)=1×10
=10;
(5)[8.3-(3.6+2.9)]×0.72=[8.3-6.5]×0.72
=1.8×0.72
=1.296;
(6)10.2×4.5
=(10+0.2)×4.5
=10×4.5+0.2×4.5
=45+0.9
=45.9.
脱式计算(能用简便方法的用简便方法计算)2.5×(6+9.728÷3.2)45×7.3+27×4.50.125×3.2×25[8.3-(3
2楼:文爷君瓣掇乊
(1)2.5×(6+9.728÷源3.2)=2.5×(bai
du6+3.04)
=2.5×9.04
=22.6
(2)45×7.3+27×4.5
=45×(7.3+2.7)
=45×10
=450
(3)0.125×3.2×25
=0.125×8×0.4×25
=(0.125×8)×zhi(0.4×25)=1×10
=10(4)[8.3-(3.6+2.9)]÷0.72=[8.3-6.5]÷0.72
=1.8÷0.72
=2.5
(5)(140+0.42)÷dao7
=140÷7+0.42÷7
=20+0.06
=20.06
(6)10.2×4.5
=(10+0.2)×4.5
=10×4.5+0.2×4.5
=45+0.9
=45.9
脱式计算.(能用简便方法计算的要用简便方法计算) (1)13.6×3-40.6÷2 (2
3楼:风子
(bai1)13.6×
du3-40.6÷2,
zhi=40.8-20.3,
=20.5;dao
(2)99×0.75+1 4
×99 ,
=99×(0.75+0.25),
=99×1,
=99;
(3)(5 6
-5 8
)×24 ,
=5 6
×24-5 8
×24,
=20-15,
=5;(4)121×1001
121,
=121×(100+1
121),
=121×100+121×1
121,
=12100+1,
=12101;
(5)15÷3-7×(1 7
+1 21
) ,=15÷3-7×4
21,=5-11 3
,=32 3
;(6)246
23÷6-1
23,=41
23-1
23,=4.
脱式计算.(能用简便方法计算用简便方法计算)70.08-1.25-1.75 4.6+2.89+5.4+3.11 22×101 45×3
4楼:匿名用户
(1)70.08-1.25-1.75,zhi=70.08-(1.25+1.75),dao=70.08-3,
=67.08;
(2)4.6+2.89+5.4+3.11,=(4.6+5.4)+(2.89+3.11),=10+6,
=16;
(3)22×
版101,
=22×100+22×1,
=2200+22,
=2222;
(4)45×36+54×36+36,
=(45+54+1)×36,
=100×36,
=3600;
(5)25×(权4×27),
=(25×4)×27,
=100×27,
=2700;
(6)85×99+85,
=85×(99+1),
=85×100,
=8500.
脱式计算 7.64×2.5-3.14×2.5(用简便方法计算)
5楼:宫野木杉
7.64×2.5-3.14×2.5
=(7.64-3.14)×2.5
=4.5×2.5
=11.25
脱式计算(第1和第2小题用简便方法计算)(1)14.5×64+64×4.5(2)2.5×32×12.5(3)(45+14)÷73
6楼:手机用户
①14.5×64+64×4.5,
=(14.5+4.5)×64,
=19×64,
=1216;
②2.5×32×12.5,
=2.5×(4×8)×12.5,
=(2.5×4)×(8×12.5),
=10×100,
=1000;
③(45+14
)÷73
+710
,=21
20×37+7
10,=920
+1420
,=1320;
④168.1÷(4.3×2-0.4),
=168.1÷(8.6-0.4),
=168.1÷8.2,
=20.5;
脱式计算.(能用简便方法的就用简便方法计算)[8.5-(3.6+3.6)]÷2.6 10.1×8...
7楼:清风
(1)[8.5-(3.6+3.6)]÷
du2.6
=[8.5-7.2]÷2.6
=1.3÷2.6
=0.5;
(2)10.1×
zhi87
=(10+0.1)×87
=10×87+0.1×87
=870+8.7
=878.7;
(3)1.4×[(7.5+38.4)÷dao0.9]=1.4×[45.9÷0.9]
=1.4×51
=71.4.
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