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Số bé là
55:(3+2)x2=22
Số lớn là
55-22=33
mk là nữ đó
k nhé
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Tính:
\(\frac{4}{7}+\frac{3}{7}=\frac{4+3}{7}=\frac{7}{7}=1\)\(1\)
\(\frac{11}{9}-\frac{2}{9}=\frac{11-2}{9}=\frac{9}{9}=1\)
\(\frac{2}{6}+\frac{5}{6}-\frac{1}{6}=\frac{2+5-1}{6}=\frac{6}{6}=1\)
Học tốt!
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\(a,\dfrac{2}{7}+\dfrac{1}{4}=\dfrac{8}{28}+\dfrac{7}{28}=\dfrac{15}{28}\\ b,\dfrac{3}{5}+\dfrac{3}{8}=\dfrac{3.8}{5.8}+\dfrac{3.5}{5.8}=\dfrac{6}{5}\\ c,=\dfrac{4.3}{9.3}+\dfrac{10}{27}=\dfrac{12+10}{27}=\dfrac{22}{27}\\ d,=\dfrac{2.3}{3.3}+\dfrac{7}{9}=\dfrac{6+7}{9}=\dfrac{13}{9}\\ e,=\dfrac{5.5}{12.5}+\dfrac{7.4}{15.4}=\dfrac{25+28}{60}=\dfrac{53}{60}\)
\(\dfrac{2}{7}+\dfrac{1}{4}=\dfrac{8}{28}+\dfrac{7}{28}=\dfrac{15}{28};\dfrac{3}{5}+\dfrac{3}{8}=\dfrac{24}{40}+\dfrac{15}{40};\dfrac{4}{9}+\dfrac{10}{27}=\dfrac{12}{27}+\dfrac{10}{27}=\dfrac{22}{27};\dfrac{2}{3}+\dfrac{7}{9}=\dfrac{18}{27}+\dfrac{21}{27}=\dfrac{39}{27};\dfrac{5}{12}+\dfrac{7}{15}=\dfrac{75}{180}+\dfrac{84}{180}=\dfrac{159}{180}\)
bang 2/3 nhe
2/6 + x = 1
x = 1 - 2/6
x = 2/3
Chúc bạn học tốt.
😁😁😁