\(\dfrac{-4}{12}+\dfrac{5}{18}\\ =\dfrac{-1}{3}+\dfrac{5}{18}\\ =\dfrac{-6}{18}+\dfrac{5}{18}\\ =\dfrac{-6+5}{18}\\ =\dfrac{-1}{18}\)
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Tìm x
5/12:I x+0,125 I = 7/24
5/12.I x-4/9I=0,75
I5/6+xI:4/5=3/8
I75%-xI.5/9=7/18
Tính nhanh:A=1*5*6+2*10*12+3*15*18+4*20*24+5*25*30/1*3*5+2*6*10+3*9*15+4*12*20+5*15*25
Thục hiện phép tính
a) A = \(\frac{5.\left(2^2.3^2\right)^9.\left(2^2\right)^6-2.\left(2^2.3\right)^{14}.3^4}{5.2^{28}.3^{18}-7.2^{29}.3^{18}}\)
b) B = \(81.\left(\frac{12-\frac{12}{7}-\frac{12}{289}-\frac{12}{85}}{4-\frac{4}{7}-\frac{4}{289}-\frac{4}{85}}:\frac{5+\frac{5}{13}+\frac{5}{169}+\frac{5}{91}}{6+\frac{6}{13}+\frac{6}{169}+\frac{6}{91}}\right).\frac{158158158}{711711711}\)
tính)
a) \(\dfrac{3}{4}+\dfrac{-7}{12}-\dfrac{2}{3}\)
b) \(15\dfrac{5}{6}+\left(\dfrac{17}{18}-\dfrac{5}{12}\right)\)
A, -1,75 - (-1/9 - 37/18)
B, (3/5)^4 . (5/3)^3
C, 5 . |-1/12| + (5/9 - 7/12) - (2/3 - 5/6)^2
so sánh : \(\frac{-8}{4},\frac{-12}{12},\frac{18}{-27},\frac{-7}{4},\frac{11}{5}\)
22 tháng 8 2023 lúc 18:37
mọi người ơi pls help me
1) -10/11 . 8/9 + 7/18 . 10/11 2) 12/25 . 23/7 - 12/7 . 13/25 3) 3/7 . 16/15 - 2/15 . -3/7 4) -4/13 . 5/17 + -12/13 . 4/17
a)-3 1/7.6/55.(-7/12)
b)18/39.(-1 5/8):(-6 3/4)
A=-5/18+32/45-9/10+(-1/4+7/33-5/33)-(-15/12+6/11+8/15) = ?
Tìm x biết:
a) 4(18-5x) - 12(3x-7) = 15(2x-16) - 6(x+14)
b) 5(3x+5) - 4(2x-3) = 5x+3(2x+12)+1
c)2(5x-8) - 3(4x-5) = 4(3x-4) + 11
d) 5x-3 {4x-2 [4x-3(5x-2)]}=182