a: \(\dfrac{25\cdot9-25\cdot17}{-8\cdot80-8\cdot10}=\dfrac{25\cdot\left(-8\right)}{-8\cdot90}=\dfrac{25}{90}=\dfrac{5}{18}=\dfrac{125}{450}\)
\(\dfrac{48\cdot12-48\cdot15}{-3\cdot270-3\cdot30}=\dfrac{-3\cdot48}{-3\cdot300}=\dfrac{4}{25}=\dfrac{72}{450}\)
8-4/2021+6/2023-12/2019
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10-5/2021-15/2019+20/2019
Rut gon phán so
Giup ml voi . can gap
\(\dfrac{40}{31.39}+\dfrac{35}{39.46}+\dfrac{30}{46.52}+\dfrac{25}{52.57}+\dfrac{20}{57.61}\)
tinh nhanh
giup mih voi
14\(\frac{1}{23}\)- \(\left(25\frac{13}{25}-10\frac{1}{23}\right)+\frac{13}{25}-2,5\)
GIUP MINH VOI!!!!!
giúp mình với, mình can gap
link của mình nè
https://hoc24.vn/hoi-dap/question/948259.html
ai tra lời nhanh mình tick
\(\frac{21}{36}\cdot\frac{5}{2}-\frac{7}{12}\cdot\frac{2}{7}+\left(2018-2019\right)^0\)
\(-12\frac{1}{3}-\frac{5}{7}+7\frac{1}{3}+1\frac{5}{7}+1^{2019}\)
GIUP MINH VOI!!!!!!
a,Tim so nguyen n de bieu thuc A=8n-9/2n+5 nhan gia tri nguyen.
b,Chung minh1/n.1/n+4=1/4.(1/n-1/n+4)
CAC BAN OI GIUP MINH VOI MAI MINH PHAI KIEM TRA RUI MA BAI KHO QUA CAC BAN OI.CAC BAN NHO GIAI NHANH NHANH GIUM MINH NHE. MINH THE MINH SE TICK CHO.MINH KHN KHOANCAU XIN CAC BAN DO.
tu dang thuc 2.3=1.6 em hay viet cac cap phan so bang nhau
cho M=(x+3)(x-5)/x^2-2x+16 a chung minh m la phan so toi gian b phan so M viet duoc duoi dang so thap phan nao
chung to rang 8^8 + 2^20 chia het cho 17
