計算下面各題,能簡算的要簡算

2021-03-17 01:09:58 字數 3880 閱讀 4172

1樓:手機使用者

(1)7.65-0.65×6,

=7.65-3.9,

=3.75;

(2)9.43-1.68-4.32,

=9.43-(1.68+4.32),

=9.43-6,

=3.43;

(3)1.25×0.76×0.8,

=(1.25×0.8)×0.76,

=1×0.76,

=0.76;

(4)0.32×7.5-0.32×4.5,=0.32×(7.5-4.5),

=0.32×3,

=0.96;

(5)3.8×10.1,

=3.8×(10+0.1),

=38+0.38,

=38.38;

(6)9.9÷[16.5-(1.7+3.8)],=9.9÷[16.5-5.5],

=9.9÷11,

=0.9.

計算下面各題,能簡算的要簡算,並寫出主要的簡算過程.(1)9.06-2.68-0.32(2)(3.06÷0.25+2.76)×0

2樓:褲兜最棒

(1)9.06-2.68-0.32,

=9.06-(2.68+0.32),

=9.06-3,

=6.06;

(2)(3.06÷0.25+2.76)×

0.2,

=(12.24+2.76)×0.2,

=15×0.2,

=3;(3)18-(3

5+4÷25),

=18-(0.6+4×52),

=18-(0.6+10),

=18-10.6,

=7.4;

(4)2.7×1.25+5.3×125%,=2.7×1.25+5.3×1.25,

=(2.7+5.3)×1.25,

=8×1.25,

=10.

計算下面各題,能簡算的要簡算.9.5×1.06-2.52÷2.43.4×0.26+0.74×3.4 1.25×32×0.87.09×99+7.0968.

3樓:手機使用者

(1)9.5×1.06-2.52÷2.4

=10.07-1.05

=9.02;

(2)3.4×0.26+0.74×3.4

=3.4×(0.26+0.74)

=3.4×1

=3.4;

(3)1.25×32×0.8

=(1.25×0.8)×32

=1×32

=32;

(4)7.09×99+7.09

=7.09×(99+1)

=7.09×100

=709;

(5)68.5+31.5÷(0.29+0.41)=68.5+31.5÷0.7

=68.5+45

=113.5;

(6)0.4×5÷0.4×5

=2÷0.4×5

=5×5

=25.

計算下面各題,能簡算的要簡算1.25×0.7×0.8 &nb...

4樓:樂事疊合呼

首先要觀察有沒有共同項,有的話就用結合定律,有時候也可以把數拆分來找規律的,回沒有的話一定會有特答俗的運算,比如125x8、25x4等等。一般都是有規律的,還需要平時多多積累。

(1)1.25×0.7×0.8

=(1.25×0.8)×0.7

=1×0.7

=0.7

(2)0.65×202

=0.65×(200+2)

=0.65×200+0.65×2

=130+1.3

=131.3

(3)1.25+4.6+0.75

=(1.25+0.75)+4.6

=2+4.6

=6.6

(4)6.1×3.6+3.6×3.9

=(6.1+3.9)×3.6

=10×3.6

=36(5)16.8÷(7.34-6.54)=16.8÷0.8

=21(6)2.7÷1.25÷8

=2.7÷(1.25×8)

=2.7÷10

=0.27

5樓:匿名使用者

=1 x 0.7

=0.7

(1.25 x 0.8 = 1000 x 0.001)

6樓:手機使用者

(1)1.25×

0.7×0.8

=(du1.25×0.8)zhi×0.7

=1×0.7

=0.7

(2)0.65×202

=0.65×(200+2)

=0.65×200+0.65×2

=130+1.3

=131.3

(3)1.25+4.6+0.75

=(1.25+0.75)+4.6

=2+4.6

=6.6

(4)6.1×3.6+3.6×3.9

=(6.1+3.9)×3.6

=10×3.6

=36(5)16.8÷dao(7.34-6.54)=16.8÷0.8

=21(6)2.7÷1.25÷8

=2.7÷(1.25×8)

=2.7÷10

=0.27

7樓:夜依舊清

1.25*0.7*0.8=1.25*.0.8*0.7=1*0.7=0.7

計算下面各題,能簡算的要簡算

8樓:du知道君

2.5×

32×12.5 =(2.5×4)×(8×12.

5) =10×100 =1000 7/9÷11/5+2/9×5/11 =7/9×5/11+2/9×5/11 =(7/9+2/9)×5/11 =1×5/11 =5/11 3/5÷【(1/5+1/3)÷2/9】專 =3/5÷【8/15÷2/9】 =3/5÷12/5 =1/4 678-192÷8×12 =678-24×12 =678-288 =390 8×(7/8-5/9)×9 =8×7/8×9-8×5/9×9 =63-40 =23 2.解方屬程或解比例。 3/4x+x=1.

4 解:1.75x=1.

4 x=1.4÷1.75 x=0.8

計算下面各題,能簡算的要簡算. 7×125×8 120-20×2+45 35×(32+128÷32) 43×36+36×57 6

9樓:魯步陽冰

(1)7×125×8

=7×(125×8)

=7×1000

=7000;

(2)120-20×2+45

=120-40+45

=80+45

=125;

(3)35×(32+128÷32)

=35×(32+4)

=35×36

=1260;

(4)43×36+36×57

=(43+57)×36

=100×36

=3600;

(5)640÷[4×(16-8)]

=640÷[4×8]

=640÷32

=20;

(6)68×101-68

=68×(101-1)

=68×100

=6800.

計算下列各題,能簡算的要簡算3/4-1/6+4/9等於多少?

10樓:義明智

分數計算

3/4-1/6+4/9

=27/36-6/36+16/36

=37/36

計算下面各題能簡算的要簡算。

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