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8,96 : X =2,03 -0,5
8,96 :X = 1,53
X = 8,96 -1,53
X = 7,43
1,2 .X = 0,54 - 0,06
1,2 .X = 0,48
X = 1,2 : 0,48
X = 2,5
\(\frac{17}{5}\)= 2\(\frac{7}{5}\); \(\frac{139}{12}\)= 10\(\frac{19}{12}\); \(\frac{150}{13}\)= 11\(\frac{7}{13}\)
NHỚ TK CHO MÌNH NHÉ
a) \(\frac{7}{8}\)=\(\frac{7x1560}{8x1560}\)=\(\frac{10920}{12480}\)
\(\frac{7}{10}\)=\(\frac{7x1248}{10x1248}\)=\(\frac{8736}{12480}\)
\(\frac{7}{13}\)=\(\frac{7x960}{13x960}\)=\(\frac{6720}{12480}\)
\(\frac{7}{12}\)=\(\frac{7x1048}{12x1048}\)=\(\frac{7280}{12480}\)
b) \(\frac{1}{4}\)=\(\frac{1x10}{4x10}\)=\(\frac{10}{40}\)
\(\frac{3}{10}\)=\(\frac{3x4}{10x4}\)=\(\frac{12}{40}\)
\(\frac{9}{40}\)
\(\frac{3}{8}\)=\(\frac{3x5}{8x5}\)=\(\frac{15}{40}\)
hơi dài xíu có gì sai mong bạn thứ lỗi đó là cách quy đồng của mình
( 12/26 + 5/8 ) + 7/13
= 12/26 + 5/8 + 7/13
= 5/8 + 12/26 + 7/13
= 5/8 + 12/26 + 14/26
= 5/8 + 1
= 13/8
( \(\frac{12}{26}+\frac{5}{8}\) )+\(\frac{7}{13}\)
= \(\frac{6}{13}+\frac{5}{8}\)+\(\frac{7}{13}\)
=( \(\frac{6}{13}+\frac{7}{13}\))+ \(\frac{5}{8}\)
=1+\(\frac{5}{8}\)
=\(1\frac{5}{8}=\frac{13}{8}\)
4/5 x 0,5 + 12/5 x 0,3 + 8 : 10 x 0,2
=4/5 x 0,5 + 12/5 x 0,3 + 4/5 x 0,2
=(4/5 + 12/5 + 4/5) x (0,5 + 0.3 + 0,2)
=4 x 1
=4
\(\frac{4}{5}x0,5+\frac{12}{5}x0,3+8:10x0,2=\)\(\frac{4}{5}x0,5+\frac{12}{5}x0,3+\frac{8}{10}x0,2=\)\(\frac{4}{5}x0,5+\frac{12}{5}x0,3+\frac{4}{5}x0,2=\)
\(=\frac{4}{5}x\left(0,5+0,2\right)+\frac{12}{5}x0,3\)\(=\frac{4}{5}x\frac{7}{10}+\frac{12}{5}x0,3=\frac{32}{25}\)
=\(\frac{8.12+8.8-8.18}{8.10-8.9}\)
=\(\frac{8.\left(12+8-18\right)}{8\left(10-9\right)}\)
=\(\frac{8.2}{8}\)
=2
\(\frac{9}{16}:\frac{27}{8}=\frac{3^2:3^3}{2^4:2^3}=\frac{\frac{1}{3}}{2}=\frac{1}{6}\)
b tương tự nha
\(\frac{9}{16}:\frac{27}{8}=\frac{9}{16}\cdot\frac{8}{21}=\frac{3\cdot3\cdot4\cdot2}{8\cdot2\cdot7\cdot3}=\frac{14}{3}\)
\(\frac{40}{7}:\frac{5}{14}=\frac{40}{7}\cdot\frac{14}{5}=\frac{4\cdot5\cdot2\cdot7\cdot2}{7\cdot5}=\frac{16}{1}=16\)
Chúc bạn học tốt
a) MC :24
\(\frac{1}{3}+\frac{3}{8}-\frac{7}{12}=\frac{1\times8+3\times3-7\times2}{24}=\frac{3}{24}=\frac{1}{8}\)
b)MC : 56
\(\frac{3}{14}+\frac{5}{8}-\frac{1}{2}=\frac{3\times4+5\times7-1\times28}{56}=\frac{19}{56}\)
c) MC: 36
\(\frac{1}{4}-\frac{2}{3}-\frac{11}{18}=\frac{1\times9-2\times12-11\times2}{36}=\frac{-37}{36}\)
d) MC: 312
\(\frac{1}{4}+\frac{5}{12}-\frac{1}{13}-\frac{7}{8}=\frac{1\times78+5\times26-1\times24-7\times39}{312}=\frac{-89}{312}\)
a)\(\frac{77}{24}\)=\(3\frac{5}{24}\)
b)=10
c)\(\frac{24}{35}\)
40, 8 : 12 - 2,03
= 3,4 – 2,03 = 1,37