c

giúp mình với

C

\(\dfrac{56}{64}=\dfrac{7}{8}\)

7/8

7/8

\(\dfrac{64}{1000}=\dfrac{64:8}{1000:8}=\dfrac{8}{125}\)

-32/45

\(\dfrac{-64}{90}=\dfrac{-32}{45}\)

\(\dfrac{-64}{90}=\dfrac{-64\div2}{90\div2}=\dfrac{-32}{45}\)

\(\frac{48}{64}\)Rút gọn = \(\frac{3}{4}\)

48/64=6/8

nha<<<

\(\frac{48}{64}=\frac{48:8}{64:8}=\frac{6}{8}\)

\(\frac{64}{100}=\frac{16}{25}\)

k nha

Trả lời

64/100=16/25

hok tốt

...

64/100 = 16/25

\(\frac{36}{64}=\frac{36:4}{64:4}=\frac{9}{16}\)

            \(~~~Hok\)tốt\(~~~\)

9/16

let's be friends

9/16 nha

\(\dfrac{90}{120}=\dfrac{30.3}{30.4}=\dfrac{3}{4}\)

\(\dfrac{15}{25}=\dfrac{5.3}{5.5}=\dfrac{3}{5}\)

\(\dfrac{18}{45}=\dfrac{9.2}{9.5}=\dfrac{2}{5}\)

\(\dfrac{36}{64}=\dfrac{4.9}{4.16}=\dfrac{9}{16}\)

\(\dfrac{32}{72}=\dfrac{8.4}{8.9}=\dfrac{4}{9}\)

\(\dfrac{84}{49}=\dfrac{7.12}{7.7}=\dfrac{12}{7}\)

\(\dfrac{90}{120}=\dfrac{3}{4};\dfrac{15}{25}=\dfrac{3}{5};\dfrac{18}{45}=\dfrac{2}{5};\dfrac{36}{64}=\dfrac{9}{16};\dfrac{32}{72}=\dfrac{4}{9};\dfrac{84}{49}=\dfrac{12}{7}\)

\(\dfrac{3}{4},\dfrac{3}{5},\dfrac{2}{5},\dfrac{9}{16},\dfrac{4}{9},\dfrac{12}{7}\)

  90 /120 = 9/12 = 3/4 

36 / 64 = 18/32= 9 /16 

90/120=3/4

36/64=9/16

ta thấy 90/120 cùng chia hết cho 3 nên phân số rút gọn là 30/40

ta thấy phân số 36/64 cùng chia hết cho 4 nên phân số rút gọn là 9/16