4+5+9+9+45+5+5+4+4+1+5=
SN
Những câu hỏi liên quan
tính nhanh 4/1 x 5+ 4/5 x 9 + 4/9 x 13+⋯+4/41 x 45 + 4/45 x 49
Tính nhanh:
a/ (1*5*6+2*10*12+4*20*24+9*45*54)/(1*3*5+2*6*10+4*12*20+9*27*45)
b/ [(1*5*6)+(2*10*12)+(4*20*24)+(9*45*54)]/[(1*3*5)+(2*6*10)+(4*12*20)+(9*27*45)]
/ là phân số nha!!!!!!!!!!!!!
bài 1
4/7+4
3+6/11
3-5/7
21/9-2
15/24+2
63/45-20/25
3/4-2/8
6/7-5/8
37/45-5/9
46/39-11/13
5/12+3/4+1/3
1/2+3/7+11/14
7/10-(1/5+1/4)
15/4-2/3-3/4
`4/7+4`
`=4/7+4/1`
`=4/7+28/7`
`=32/7`
__
`3+6/11`
`=33/11+6/11`
`=39/11`
__
`3-5/7`
`=3/1-5/7`
`=21/7-5/7`
`=16/7`
__
`21/9-2`
`=21/9-18/9`
`=3/9`
`=1/3`
__
`15/24+2`
`=15/24+48/24`
`=63/24`
`=21/16`
__
`63/45-20/25`
`=63/45-4/5`
`=63/45-36/45`
`=27/45`
`=9/15`
__
`3/4-2/8`
`=3/4-1/4`
`=2/4`
__
`6/7-5/8`
`=48/56-35/56`
`=13/56`
__
`37/45-5/9`
`=37/45-25/45`
`=12/45`
`=4/15`
__
`46/39-11/13`
`=46/39-33/39`
`=13/39`
`=1/2`
__
`5/12+3/4+1/3`
`=5/12+9/12+4/12`
`=14/12+4/12`
`=18/12`
`=3/2`
__
`1/2+3/7+11/14`
`=7/14+6/14+11/14`
`=13/14+11/14`
`=24/14`
`=12/7`
__
`7/10-(1/5+1/4)`
`=7/10-(4/20+5/20)`
`=7/10-9/20`
`=14/20-9/20`
`=5/20`
`=1/4`
__
`15/4-2/3-3/4`
`=(15/4-3/4)-2/3`
`=12/4-2/3`
`=3-2/3`
`=9/3-2/3`
`=7/3`
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1+1+5+9+4+1+74+5+74+45+85+7+7+4+4+5=
tìm x : 5/6-(x2/8)=1/4
(x-3/5)×3/4=21/20
49/45:x/9=7/5
x×1/5+x×1/5+x×3/5=8/9
8/9:x-5/9:x=1/36
5/4×(x×2)=11/4
Tìm x biết
A, x/4 - 3/7 + 2/5 = 31/140
B, 5/12 + 5/x - 1/8 = 1/2
C, x + 4/5×9 + 4/9×13 + 4/13×17 +.....+ 4/41×45 = -37/45
45 x 6 =
1 + 1 + 2 + 2 + 3 + 3 + 4 + 4 + 5 + 5 + 6 + 6 + 7 + 7 + 8 + 8 + 9 + 9 =
78 : 5 =...(dư...)
45 : 5 =
x : 5 = 25
45x6=270
1+1+2+2+3+3+4+4+5+5+6+6+7+7+8+8+9+9
=(1x2)+(2x2)+(3x2)+(4x2)+(5x2)+(6x2)+(7x2)+(8x2)+(9x2)
=2+4+6+8+10+12+14+16+18
=6+6+8+10+12+14+16+18
=12+8+10+12+14+16+18
=20+10+12+14+16+18
=30+12+14+16+18
=42+14+16+18
=56+16+18
=72+18
=90
78:5=15(dư3)
45:5=9
x:5=25
x= 25x5
x= 125
tk nhé
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45 x 6 = 270
1 + 1 + 2 + 2 + 3 + 3 + 4 + 4 + 5 + 5 + 6 + 6 + 7 + 7 + 8 + 8 + 9 + 9
= 2 + 4 + 6 + 8 + 10 + 12 + 14 + 16 + 18
= ( 2 + 18 ) x 9 : 2
= 90
78 : 5 = 15 ( dư 3 )
45 : 5 = 9
x : 5 = 25
x = 25 x 5
x = 125
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\(45x6=270\)
\(1+1+2+2+3+3+4+4+5+5+6+6+7+7+8+8+9+9\)
\(=1.2+2.2+3.2+4.2+5.2+6.2+7.2+8.2+9.2\)
\(=2+4+6+8+10+12+14+16+18\)
\(=\left(2+18\right)+\left(4+16\right)+\left(6+14\right)+\left(8+12\right)+10\)
\(=10+10+10+10+10\)
\(=10.5\)
\(=50\)
\(78:5=15\left(du3\right)\)
\(45:5=9\)
\(x:5=25\)
\(x=25.5\)
\(x=125\)
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Bài 2 :Tính
a.2/5+1/4
b.2/3+1/12
c.2/9+1/6
d.18/45+6/5+1/9
e.6/5+4/5+5
g.3/7+9/28+4/7
Giúp mình giải nhé
Ai nhanh mình sẽ tick cho nha.
Xem chi tiết
CK
23 tháng 3 2022 lúc 19:56
1+1+1+1+1+2+3+4+5+6+7+8+9+10 x 1+1+1+1+1+2+3+4+5+6+7+8+9+10 +1+1+1+1+1+2+3+4+5+6+7+8+9+10 - 10 x 9 - 9 + 45 +46 +47 =
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