兩道數學簡便計算題(六年級),六年級的兩道簡便計算題

2022-12-15 23:20:11 字數 7159 閱讀 5632

1樓:橫州鎮_二中噠

9+9.9+9.99+9.999

=(10-1)+(10-0.1)+(10-0.01)+(10-0.001)

=10*4-(1+0.1+0.01+0.001)=40-1.111

=38.889

5/2*3/4-(7/8+5/3除以5/2=15/8-(7/8+2/3)

=15/8-7/8-2/3

=1-2/3

=1/3

至於4/25*5/12除以(1/5+7/15)不能簡便,直接算就ok勒。我的答案絕對是對的,沒錯。

2樓:匿名使用者

9+9.9+9.99+9.999

=(10-1)+(10-0.1)+(10-0.01)+(10-0.001)

=10*4-(1+0.1+0.01+0.001)=40-1.111

=38.889

5/2*3/4-(7/8+5/3除以5/2)=5/2*3/4-(7/8+2/3)

=15/8-7/8-2/3

=(15/8-7/8)-2/3

=1-2/3

=1/3

3樓:匿名使用者

9+9.9+9.99+9.999

=(10-1)+(10-0.1)+(10-0.01)+(10-0.001)

=10×4-(1+0.1+0.01+0.001)=40-1.111

=38.889

5/2×3/4-(7/8+5/3÷5/2)=5/2×3/4-(7/8+2/3)

=15/8-7/8-2/3

=1-2/3

=1/3

六年級的兩道簡便計算題

4樓:丶丨鑫

19.9÷(8×1.99)

=(19.9÷1.99)×8

=10×8

=808分之5×79+8分之5+20×8分之5=8分之5×(79+1+20)

=8分之5×100

=2分之125

六年級數學,10道簡便計算題帶答案謝謝哦∩_∩

5樓:匿名使用者

我來答 檢視全部11個回答

凌月霜丶

知道合夥人教育行家 推薦於 2018-02-24(1)2.64×1.7-2.64×0.7

=2.64×(1.7-0.7)

=2.64×1

=2.64

(2)31.5×1.07-3.15×0.7=3.15×10.7-3.15×0.7

=3.15×(10.7-0.7)

=3.15×10

=31.5

(3)2.7×5.7-2.7+5.3×2.7=2.7×(5.7-1+5.3)

=2.7×10

=27(4)0.625÷0.125×0.8=(0.625×0.8)×8÷(0.128×8)=0.5×8÷1

=4(5)18.6×6.1+3.9×18.6=18.6×(6.1+3.9)

=18.6×10

=186

(6)1.3579+3.5791+5.7913+7.9135+9.1357

=(1+3+5+7+9)×1.1111

=25×1.1111

=27.7775

(7)52.5x2.9+5.45

=5.25x29+5.25+0.2

=5.25×(29+1)+0.2

=5.25×30+0.2

=157.5+0.3

=157.7

(8)0.92x15+0.08x15

=(0.92+0.08)×15

=1×15

=15(9)0.72×1.25×2.5

=0.9×(0.8×1.25)×2.5

=0.9×1×2.5

=2.25

(10)400.6x7-2003x0.4

=200.3x14-200.3x4

=200.3×(14-4)

=200.3×10

=2003

6樓:凌月霜丶

(1)2.64×1.7-2.64×0.7

=2.64×(1.7-0.7)

=2.64×1

=2.64

(2)31.5×1.07-3.15×0.7=3.15×10.7-3.15×0.7

=3.15×(10.7-0.7)

=3.15×10

=31.5

(3)2.7×5.7-2.7+5.3×2.7=2.7×(5.7-1+5.3)

=2.7×10

=27(4)0.625÷0.125×0.8=(0.625×0.8)×8÷(0.128×8)=0.5×8÷1

=4(5)18.6×6.1+3.9×18.6=18.6×(6.1+3.9)

=18.6×10

=186

(6)1.3579+3.5791+5.7913+7.9135+9.1357

=(1+3+5+7+9)×1.1111

=25×1.1111

=27.7775

(7)52.5x2.9+5.45

=5.25x29+5.25+0.2

=5.25×(29+1)+0.2

=5.25×30+0.2

=157.5+0.3

=157.7

(8)0.92x15+0.08x15

=(0.92+0.08)×15

=1×15

=15(9)0.72×1.25×2.5

=0.9×(0.8×1.25)×2.5

=0.9×1×2.5

=2.25

(10)400.6x7-2003x0.4

=200.3x14-200.3x4

=200.3×(14-4)

=200.3×10

=2003

7樓:匿名使用者

152×

3÷2=456÷2

=228

43×12×6

=516×6

3096

200+25×33

=200+825

=1025

(25+26)×48

=51×48

=2448

576-(290+107)

=576-397

=179

腦子已短缺,只有這麼多

8樓:匿名使用者

62×7.1+2.9,

=440.2+2.9,

=443.1;

4.2×0.25,

=(4+0.2)×0.25,

=4×0.25+0.2×0.25,

=1+0.05,

=1.05;

5.2×4.3+0.8×4.3,

=(5.2+0.8)×4.3,

=6×4.3,

=25.8.

8.5+1.5÷0.25×4,

=8.5+6×4,

=8.5+24,

=32.5.

0.25×0.8+2.5%

=0.2+2.5%,

=0.225;

32×125×2.5,

=4×8×125×2.5,

=8×125×(4×2.5),

=1000×10,

=10000;

94÷(6.84×8.5-31.46÷0.55),=94÷(58.14-57.2),

=94÷0.94,

=100.

13÷0.4÷2.5,

=13÷(0.4×2.5),

=13÷1,

=13;

1.25×2.5×0.8,

=(1.25×0.8)×2.5,

=1×2.5,

=2.5;

1.5×101-1.5,

=1.5×(101-1),

=1.5×100,

=150;

4.8×101,

=4.8×100+4.8×1,

=480+4.8,

=484.8.

3.25×4.7-7.8,

=15.275-7.8,

=7.475;

0.57+0.43×0.24,

=0.57+0.1032,

=0.6732.

945÷5÷3,

=189÷3,

=63;

152×3÷2,

=456÷2,

=228;

43×12×6,

=516×6,

=3096.

200+25×33,

=200+825,

=1025;

(25+26)×48,

=51×48,

=2448.

576-(290+107),

=576-397,

=179;

649+124-556,

=773-556,

=217.

4.82-5.2÷0.8×0.6,

=4.82-6.5×0.6,

=4.82-3.9,

=0.92.

我這兒有哦,這麼多,不知道你夠不夠

9樓:新野旁觀者

1.3/7 × 49/9 - 4/3

2.8/9 × 15/36 + 1/27

3.12× 5/6 – 2/9 ×3

4.8× 5/4 + 1/4

5.6÷ 3/8 – 3/8 ÷6

6.4/7 × 5/9 + 3/7 × 5/97.5/2 -( 3/2 + 4/5 )

8.7/8 + ( 1/8 + 1/9 )9.9 × 5/6 + 5/6

10.3/4 × 8/9 - 1/3

11.7 × 5/49 + 3/14

12.6 ×( 1/2 + 2/3 )

13.8 × 4/5 + 8 × 11/514.31 × 5/6 – 5/6

15.9/7 - ( 2/7 – 10/21 )16.5/9 × 18 – 14 × 2/717.

4/5 × 25/16 + 2/3 × 3/418.14 × 8/7 – 5/6 × 12/1519.17/32 – 3/4 × 9/2420.

3 × 2/9 + 1/3

21.5/7 × 3/25 + 3/7

22.3/14 ×× 2/3 + 1/6

23.1/5 × 2/3 + 5/6

24.9/22 + 1/11 ÷ 1/2

25.5/3 × 11/5 + 4/3

26.45 × 2/3 + 1/3 × 1527.7/19 + 12/19 × 5/628.1/4 + 3/4 ÷ 2/3

29.8/7 × 21/16 + 1/2

30.101 × 1/5 – 1/5 × 21

10樓:星辰

一年級數學十道簡便計算時這個六年級的數學也是說簡單也簡單說難也很難現在的孩子的質量越來越提高了

11樓:匿名使用者

題目:62.1x6+5x62.1-62.1答案:=62.1x(6+5-1)

=62.1×10

=621

12樓:豔陽天

第四題的0.128×8不等於1因該是0.125×8

13樓:匿名使用者

47x29十47x71

=47x(29+71)

=47x100

=4700

92x99+92

=(99+1)x92

=100x92

=9200

210x23

=(200+1)x23

=200x23+23x1

=4600+23

=4623

14樓:匿名使用者

來個方程

x-2/7x=3/4

?解:5/7x=3/4

x=3/4×7/5

x=21/20

謝謝您

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