谁有一些脱式计算题
答案:3 悬赏:40 手机版
解决时间 2021-02-23 08:05
- 提问者网友:一抹荒凉废墟
- 2021-02-22 09:27
谁有一些脱式计算题
最佳答案
- 五星知识达人网友:神鬼未生
- 2021-02-22 10:05
9
20)10.2×4)
19)0.5+2.55)÷8.8×0.74
22)32.8
14)(3.5)÷1.728÷3.13)+4.8-1.7
21)5.12× 4.8-6.2×(1.12×4.5+2.4-5.2×5
18)6.6÷4
17)7.5)÷1.2×1.87-0.15-10.8×(3.9+0.5
13)0.6
16)6-1.68×1.75×0.2÷0.5×(4.6
15)3.32×1.8-1.52-(6+91)50+160÷40
2)120-144÷18+35
3)347+45×2-4160÷52
4)(58+37)÷(64-9×5)
5)95÷(64-45)
6)178-145÷5×6+42
7)812-700÷(9+31×11)
8)85+14×(14+208÷26)
9)(284+16)×(512-8208÷18)
10)120-36×4÷18+35
11)(58+37)÷(64-9×5)
12)(6.2×3.8÷0
20)10.2×4)
19)0.5+2.55)÷8.8×0.74
22)32.8
14)(3.5)÷1.728÷3.13)+4.8-1.7
21)5.12× 4.8-6.2×(1.12×4.5+2.4-5.2×5
18)6.6÷4
17)7.5)÷1.2×1.87-0.15-10.8×(3.9+0.5
13)0.6
16)6-1.68×1.75×0.2÷0.5×(4.6
15)3.32×1.8-1.52-(6+91)50+160÷40
2)120-144÷18+35
3)347+45×2-4160÷52
4)(58+37)÷(64-9×5)
5)95÷(64-45)
6)178-145÷5×6+42
7)812-700÷(9+31×11)
8)85+14×(14+208÷26)
9)(284+16)×(512-8208÷18)
10)120-36×4÷18+35
11)(58+37)÷(64-9×5)
12)(6.2×3.8÷0
全部回答
- 1楼网友:神也偏爱
- 2021-02-22 12:16
1.(1/69+2/71)乘23+25除以71
=1/69*23+2/71*23+25/71
=1/3+(46/71+25/71)
=1/3+1
=4/3
2.(1+1/2)乘(1-1/2)乘(1+1/3)乘(1-1/3)乘........乘(1+1/9)乘(1-1/9)
=3/2*1/2*4/3*2/3...*10/9*8/9
=1/2*10/9(中间的都约去了)
=5/9
3.1/2乘3+1/3乘4+.......+1/19乘20
=1/2-1/3+1/3-1/4+...+1/19-1/20
=1/2-1/20
=9/20
4.1/27+505/2727+131313/272727
=1/27+5*101/(27*101)+13*10101/(27*10101)
=1/27+5/27+13/27
=19/27
5.100-98+96-94+....+4-2
=(100-98)+(96-94)+...(4-2)
=2+2+...+2(共有25个)
=2*25
=50
五十二又二十五分之十一×79.45+159×47.56+七十九又二十分之十一×52.44
=52.44×79.45+159×47.56+79.55×52.44
=52.44×(79.45+79.55)+159×47.56
=52.44×159+159×47.56
=159×(52.44+47.56)
=159×100
=15900
3)2002+2001-2000-1999+1998+1997-1996-1995+……+2+1
=(2002-2000)+(2001-1999)+(1998-1996)+(1997-1995)+……+(6-4)+(5-3)+2+1
=2+2+2+2+……+2+2(从3-2002共2000个数,所以有1000个2)+2+1
=1000×2+2+1
=2003
4,5两题均用到一个转换式1/(a×b)=1/(b-a)×(1/a-1/b)
如1/15=1/(3×5)=1/(5-3)×(1/3-1/5)=1/2×(2/15)=1/15可验证一下
4)(1×2分之一)+(2×3分之一)+(3×4分之一)+……+(10×11分之一)
=1/(1×2)+1/(2×3)+1/(3×4)+……+1/(10×11)
=(1-1/2)+(1/2 - 1/3)+(1/3 - 1/4)+……+(1/10 - 1/11)
=1-1/11
=10/11
5)三分之一+十五分之一+三十五分之一+六十三分之一+九十九分之一
=1/(1×3)+1/(3×5)+1/(5×7)+1/(7×9)+1/(9×11)
=1/2×(1-1/3)+1/2×(1/3-1/5)+1/2×(1/5-1/7)+1/2×(1/7-1/9)+1/2×(1/9-1/11)
=1/2×(1 - 1/3 + 1/3 - 1/5 + 1/5 - 1/7 + 1/7 - 1/9 + 1/9 - 1/11)
=1/2×(1-1/11)
=1/2×10/11
=5/11
2.8×4-5x=5.8
解:11.2-5x=5.8
5.4=5x
1.08=x
1.6x+2.4=7.2
解:1.6x=4.8
x=3
11.2-5x=5.8
解:5x=5.4
x=1.08
3.4x-6=4.2
解:3.4x=10.2
x=3
7.8x+5=44
解:7.8x=39
x=5
100x+200=400
解:100x=400-200
x=200÷100
x=2
50x+100=200
解: 50x=200-100
x=100÷50
x=2
10x+20=40
解:10x=40-20
x=20÷10
x=2
- 2楼网友:怀裏藏嬌
- 2021-02-22 11:22
1/9)+1/..6x+2;69+2/.08
3;2)乘(1-1/2×(1-1/5)+1/20
4;9
3;3+1
=4/15)=1/(10×11)
=(1-1/.8X=39
X=5
100x+200=400
解;15可验证一下
4)(1×2分之一)+(2×3分之一)+(3×4分之一)+……+(10×11分之一)
=1/.45+159×47;3)+(1/..56+七十九又二十分之十一×52;3-1/:7;3)乘..56)
=159×100
=15900
3)2002+2001-2000-1999+1998+1997-1996-1995+……+2+1
=(2002-2000)+(2001-1999)+(1998-1996)+(1997-1995)+……+(6-4)+(5-3)+2+1
=2+2+2+2+……+2+2(从3-2002共2000个数.*10/.乘(1+1/19乘20
=1/.44×159+159×47.8x+5=44
解;11
2.100-98+96-94+.2
X=3
7;9)
=3/.56+79;2×(1/5-1/.56
=52..4X=10;27+505/11)
=1/:3;9 - 1/20
=9/4)+……+(1/2*1/(27*10101)
=1Ǘ: 50x=200-100
x=100÷50
x=2
10x+20=40
解.44
=52;3)乘(1-1/.8×4-5x=5.6X=4.;(B-A)×(1/.44
=52.;9-1/7-1/3 + 1/.;5)=1/20
=1/:100x=400-200
x=200÷100
x=2
50x+100=200
解;9*8/A-1/5 + 1/11
=10/.2
解;2)+(1/,所以有1000个2)+2+1
=1000×2+2+1
=2003
4;3)+1/.+1/4+;3+(46/7 - 1/.4x-6=4;71+25/.56
=159×(52.,5两题均用到一个转换式1/11
5)三分之一+十五分之一+三十五分之一+六十三分之一+九十九分之一
=1/..4
X=1.+4-2
=(100-98)+(96-94)+;3*2/(3×5)=1/3+1/:5X=5;2×(2/.;5 - 1/.8
解.;2727+131313/..;27+5/11)
=1-1/11
=5/3;69*23+2/9
=1/(7×9)+1/.2-5X=5;7 + 1/.1/3
2.8
X=3
11.55)+159×47;(1×2)+1/(3×4)+……+1/(A×B)=1/:1.(1+1/10 - 1/19-1/27+13/.2
解;2*4/11)
=1/..8
解.55×52.+2(共有25个)
=2*25
=50
五十二又二十五分之十一×79;3 - 1/27+5*101/15=1/.4=7..44×(79;2)乘(1+1/.08=X
1;71)
=1/.:11;11)
=1/9(中间的都约去了)
=5/.4=5X
1..8
5;(3×5)+1/2-1/2-1/(27*101)+13*10101/27
=19/.2-5X=5;2 - 1/2×10/2乘3+1/9)乘(1-1/.;(2×3)+1/9 + 1/(9×11)
=1/3-1/3 - 1/(1×3)+1/2×(1 - 1/71*23+25/2×(1/3乘4+;(5×7)+1/2×(1/7)+1/..44×79;2×(1/2×(1-1/.;3-1/27
5;(5-3)×(1/B)
如1/.44+47..45+79;2*10/.45+159×47.+1/.(4-2)
=2+2+.;272727
=1/..;71
=1/71)乘23+25除以71
=1/.(1/
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