Rút gọn phân số 56/64
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A;18/27=2/3;24/56=3/7
Vay2/3<3/7
B36/90=2/5;50/125=2/5
2/5=2/5
C121/77=11/7;88/64=11/8
vai11/7co mau be hon 11/8 ma tu bang nhau nen
11/7>11/8
D52/91=4/7,60/84=5/7
phan so co mau bang nhau tu cua 5/7 lon hon4/7 nen 4/7<5/7
tich nha
\(\frac{36}{64}=\frac{36:4}{64:4}=\frac{9}{16}\)
\(~~~Hok\)tốt\(~~~\)
\(\dfrac{90}{120}=\dfrac{30.3}{30.4}=\dfrac{3}{4}\)
\(\dfrac{15}{25}=\dfrac{5.3}{5.5}=\dfrac{3}{5}\)
\(\dfrac{18}{45}=\dfrac{9.2}{9.5}=\dfrac{2}{5}\)
\(\dfrac{36}{64}=\dfrac{4.9}{4.16}=\dfrac{9}{16}\)
\(\dfrac{32}{72}=\dfrac{8.4}{8.9}=\dfrac{4}{9}\)
\(\dfrac{84}{49}=\dfrac{7.12}{7.7}=\dfrac{12}{7}\)
\(\dfrac{90}{120}=\dfrac{3}{4};\dfrac{15}{25}=\dfrac{3}{5};\dfrac{18}{45}=\dfrac{2}{5};\dfrac{36}{64}=\dfrac{9}{16};\dfrac{32}{72}=\dfrac{4}{9};\dfrac{84}{49}=\dfrac{12}{7}\)
\(\dfrac{56}{64}=\dfrac{7}{8}\)
7/8