脫式計算下列各題 能簡算的要簡算

2021-03-17 01:39:45 字數 2813 閱讀 5757

1樓:炒麵大叔

8.72*45.8/8.72/45.8*8.72 =8.72*45.8/45.8*8.72/8.72=8.72

1.1/[(20+9.744/2.

4)*0.5-1.03]=1.

1/[(20+4.06)*0.5-1.

03]=1.1/(12.03-1.

03)=1.1/11=0.1

[19+1.9*(3.8-0.

38*0.5/0.05)]/0.

38 =[19+1.9*(3.8-3.

8)]/0.38=19/0.38=50

[27*4.5+8/0.6]-[120-(40*0.

25+25/0.5)*2]*1999=[121.5+40/3]-[120-(10+50)*2]*1999=[121.

5+40/3]-0=134.83(約等於)

計算下面各題 脫式計算 (能簡算的要簡算)

2樓:叫啥知不道

一,7分之

1-7分之3÷zhi4

=1/7-1/7*3/4

=1/7*(1-3/4)

=1/7*1/4

=1/28

二,12分之dao

內5÷8分之9×容5分之3

=5/12*8/9*3/5

=2/9

三,2又9分之2÷1又8分之3-9分之2×11分之8=20/9*8/11-2/9*8/11

=(20/9-2/9)*8/11

=2*8/11

=16/11

=1又5/11

四,15-(12分之1+16分之1)×48=15-48*1/12-48*1/16

=15-4-3

=8五,30%[(4分之3-2分之1)×5分之4]=3/10*(3/4*4/5-1/2*4/5)=3/10*1/5

=3/50

六,(2分之9-3分之10)÷5分之14×15%=7/6*5/14*3/20

=1/16

脫式計算下面各題(能簡算的要用簡便方法計算,並寫出簡算過程). 450÷18×25+173. 670+65÷

3樓:匿名使用者

(1)450÷18×25+173,

=25×25+173,

=625+173,

=798;

(2)670+65÷3×35,

=670+65×(13×3

5),=670+65×15,

=670+13,

=683;

(3)58-1

6×45+57,=58

-215

+57,

=59120

+57,

=5759

120;

(4)38-12×6÷16,

=38-72÷16,

=38-4.5,

=33.5.

脫式計算下面各題(能簡算的要用簡便方法計算,並寫出簡算過程). (84×27-2166)÷17 115×3.

4樓:小柒

①(84×27-2166)÷17,

=(2268-2166)÷17,

=102÷17,

=6;②11

5×3.7+5.3÷5

11+2.2,

=2.2×3.7+5.3×2.2+2.2,=2.2×(3.7+5.3+1),

=2.2×10,

=22;

③(0.75÷3-0.1)×(1-23),=(0.25-0.1)×13,

=0.15×13,

=0.05.

計算下面各題,能簡算的要簡算。(脫式計算) (6/35+4/21)÷4/7 2/ 50

5樓:匿名使用者

(6/35+4/21)÷4/7

=6/35×7/4+4/21×7/4

=3/10+1/3

=9/30+10/30

=19/30

2/9÷2/7÷14/15

=2/9×7/2×15/14

=14/18×15/14

=5/6

(5/6-3/4)÷5/12+4/5

=5/6×12/5-3/4×12/5+4/5=2-9/5+4/5

=2-13/5

=-3/5

3/10÷(4/5-1/2)

=3/10×5/4-3/10×2

=3/8-3/5

=15/40-24/40

=-9/40

2/25÷3/7+23/25÷3/7

=(2/25+23/25)÷3/7

=1×7/3

=2又1/3

8/9÷5/6+1/6

=8/9×6/5+1/6

=16/15+1/6

=32/30+5/30

=37/30

=1又7/30

2/3x=16

x=16×3/2

x=24

3/4x+1/4=3/8

3/4x=3/8-1/4

3/4x=1/8

x=1/8×4/3

x=1/6

1/5x-1/2=3/10

1/5x=1/2+3/10

1/5x=8/10

x=8/10×5x=4

6樓:**防騙

6/35x7/4十4/2lx7/4=3/10十1/3=9/30十10/30=19/30

2/9x7/2x1/14=1/185/6

計算下列各題。(能簡算的要簡算)15(

3 1 7 2 4 1 1 3 1 4 2 7 28 84 21 84 12 84 19 84答 1 計算下面各題。能簡算的要簡算 15 3 2 5 3 6 5 8 1 12 5 7 3 15 2 3 3 5 15 2 3 15 3 5 10 9 19 5 6 1 8 5 12 3 7 5 6 13...

脫式計算,能簡算的要簡算,脫式計算(能簡算要簡算)?

1.3.8 3.91 復 22 19.7 3.8 3.91 2.3 3.8 1.7 5.5 68 0.5x 7.5 0.7 68 0.5x6.8 68 0.5 6.8 68 6.8 0.5 20352 162 36x24 352 4.5x24 352 108 244 六分之 制五 十四分之五 七分之...

計算下面各題能簡算的要簡算。

簡便計算過程方法如下 解 10.7 0.2 1.9 8.62 10.7 0.38 8.62 10.7 0.38 8.62 10.7 9 1.7 原式 10.7 0.38 8.62 10.7 0.38 8.62 10.7 9 1.7 希望採納,謝謝 原式 10.7 0.38 8.62 10.7 9 1...