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a ) \(\frac{3}{4}\)+ \(\frac{1}{6}\) = \(\frac{18}{24}\)+ \(\frac{4}{24}\)= \(\frac{22}{24}\)
b ) \(\frac{11}{12}\)- \(\frac{3}{4}\)= \(\frac{11}{12}\)- \(\frac{9}{12}\)= \(\frac{2}{12}\)
c ) \(\frac{11}{12}\)- \(\frac{1}{6}\) = \(\frac{11}{12}\)- \(\frac{2}{12}\) = \(\frac{9}{12}\)
d ) \(\frac{1}{6}\)+ \(\frac{3}{4}\)= \(\frac{4}{24}\)+ \(\frac{18}{24}\) = \(\frac{22}{24}\)
Xin lỗi mình không rút gọn nha !
514 : 2 + 3 = 257 + 3 = 260
664 : 4 - 20 = 166 - 20 = 146
246 x 4 : 6 = 984 : 6 = 164
390 : 5 - 45 = 78 - 45 = 33
\(\frac{3}{4}+\frac{1}{6}=\frac{9+2}{12}=\frac{11}{12}\)
\(\frac{11}{12}-\frac{3}{4}=\frac{11-9}{12}=\frac{2}{12}=\frac{1}{6}\)
\(\frac{11}{12}-\frac{1}{6}=\frac{11-2}{12}=\frac{9}{12}=\frac{3}{4}\)
\(\frac{1}{6}+\frac{3}{4}=\frac{2+9}{12}=\frac{11}{12}\)
= 15/30 - 12/30 + 10/30 - 15/30 + 5/30
= ( 15 - 12 + 10 -15 + 5 ) / 30
= 3/30
= 1/10
\(\frac{16}{7}x\frac{3}{8}-\frac{1}{3}=\frac{6}{7}-\frac{1}{3}=\frac{11}{21}\)
\(\frac{12}{6}x\frac{6}{3}+\frac{12}{6}=2x2+2=4+2=6\)
\(\left(\frac{12}{6}+\frac{12}{6}\right)x12=\left(2+2\right)x12=4x12=48\)
học tốt~~~
16/7 x 3/8 - 1/3 = 11/21
12/6 x 6/3 + 12/6 = 12/6 + ( 6/3 + 1) = 12/6 + 3=5
(12/6 +12/6) x 12 = 4 x 12 = 48
k mk nha
a, \(\dfrac{5}{6}\) = \(\dfrac{10}{12}\) = \(\dfrac{30}{36}\) b, \(\dfrac{40}{16}\) = \(\dfrac{10}{4}\) = \(\dfrac{200}{80}\)
c, \(\dfrac{9}{12}\) = \(\dfrac{3}{4}\) = \(\dfrac{54}{72}\) d, \(\dfrac{84}{21}\) = \(\dfrac{28}{7}\) = \(\dfrac{4}{1}\)
helppp, ai lm đúng mk cho 1coin
helppp, ai lm đúng mk cho 1coin