M=25.36 x 25.34 and P =25.35 x 25.35
Answer : M ........... P
Những câu hỏi liên quan
Bài 1:
a) Tính nhanh: 18.34+25.34+43.66
b) Tìm x biết: (17x-5.72):23=(232-83)2-152
c) Tìm số tự nhiên x biết rằng: x+(x+1)+(x+2)+...+(x+100)=208969
)18.34+25.34+43.66
=(18+25).34+43.66
=43.34+43.66
=43.(34+66)
=43.100=4300
c)x+(x+1)+(x+2)+...+(x+100)=208969
so so hang la: (100-1);1+1=100(so hang)
x+1+x+2+...+x+100=208969
(x+x+...+x)+(1+2+...+100)=208969
(x.101)+[(1+100).100:2]=208969
101x+5050=208969
101x=203919|
x=203919:101
x=2019
vay x=2019
a)197+3.(34 -4 . 16) b)25.134-25.34+100 c)4×+60=32.5 d)x chia hết 21;xchia hết 28 và100<x<200
a: =197+3*(34-64)
=197-3*30
=197-90=107
b: =25(134-34)+100=100*26=2600
d: =>x thuộc B(84)
mà 100<x<200
nên x=168
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209489.23+2548625.23-25.36*8953=?
Tính nhanh : 25.34+50.83
tính nhanh:
A=32.61+4.28+45.35+67.39+5.72-25.35
(45,35-25,35)+(4,28+5,72)+ (3,61+67,39)
=20+10+71
=30+71
=101
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A= (32,61+ 67,39)+(4,28+5,72)+(45,35-25,35)
= 100+ 10 + 20
= 130
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mình nhầm 130 mới đúng chân thành xin lỗi bạn nha !
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A=8/9.15/16.24/25.35/36.48/49.63/64
Trước hết ta đi chứng minh 1 bài toán \(a^2-1=\left(a-1\right)\left(a+1\right)\) (1)
Thật vậy \(\left(a-1\right)\left(a+1\right)=\left(a-1\right)a+\left(a-1\right)=a^2-a+a-1=a^2-1\)
Áp dụng (1) ta có:
\(A=\dfrac{2\cdot4}{3^2}\cdot\dfrac{3\cdot5}{4^2}\cdot...\cdot\dfrac{7\cdot9}{8^2}\\ =\dfrac{2\cdot3\cdot4^2\cdot...\cdot7^2\cdot8\cdot9}{3^2\cdot4^2\cdot...\cdot8^2}=\dfrac{2\cdot9}{3\cdot8}\\ =\dfrac{18}{24}=\dfrac{3}{4}\)
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3 tháng 3 2017 lúc 20:04
The charges for the usage of per m3 of water and per kWh of electricity are $1.94 and 26 cents respectively. In May, Mr Kumar used x m3 of water and y kWh of electricity and his bill came to $272.10. In June, his bill came to $202.60 for the usage of (x-5) m3 of water and (3y - 1950) kWh of electricity. Form two equations in x and y and solve these two equations to find the total cost of using (x+8) m3 of water and (2y-725) kWh of electricity.
Đọc tiếp
The charges for the usage of per m3 of water and per kWh of electricity are $1.94 and 26 cents respectively. In May, Mr Kumar used x m3 of water and y kWh of electricity and his bill came to $272.10. In June, his bill came to $202.60 for the usage of (x-5) m3 of water and (3y - 1950) kWh of electricity. Form two equations in x and y and solve these two equations to find the total cost of using (x+8) m3 of water and (2y-725) kWh of electricity.
Tính nhẩm
a.25.34
b.1600:25
c.84:17
d.1454-97
a)25.34=850
b)1600:25=64
c)84:17=14(dư16)
d)1454-97=1357
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a, 25.34 = (20 + 5 ) .34 = 20.34 + 5 .34 =680 + 170 = 850
b, 1600 : 25 = ( 1600 . 4 ) : ( 25 .4 ) = 6400 : 100 = 64
c, 84 : 17 = 4 dư 16
d, 1454-97 = ( 1454 + 3 ) - ( 97 + 3 ) =1457 - 100 = 1357
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If \(\frac{1}{x}\)= m + n and \(\frac{1}{y}\)= m - n , find \(\frac{x+y}{x-y}\)in terms of m and n
Giải gấp giải gấp !!!!!