express fractions below having equal denominators: a) 2/5, 7/10, 9/40. b) 17/25, 23/40, 67/120​

Question

express fractions below having equal denominators: a) 2/5, 7/10, 9/40. b) 17/25, 23/40, 67/120​

in progress 0
Kiệt Gia 4 years 2021-08-18T19:31:21+00:00 1 Answers 34 views 0

Answers ( )

  1. quangkhai
    0
    2021-08-18T19:32:44+00:00
    Reply

    Answer:

    Step-by-step explanation:

    a) 5 = 5

    10 = 2 * 5

    40 = 2 * 2 * 2 *5

    Least common denominator = 2*2*2*5=40

    Now find equal fractions with denominator 40

    \frac{2}{5}=\frac{2*8}{5*8}=\frac{16}{40}\\\\\frac{7}{10}=\frac{7*4}{10*4}=\frac{28}{40}\\\\\frac{9}{40}

    Fractions with equal denominators:

    \frac{16}{40} ; \frac{28}{40} ; \frac{9}{40}

    b) 25 = 5* 5

    40 =  2 * 2 * 2 * 5

    120 = 2 * 2 * 2 * 3 * 5

    Least common denominator = 8*25*3=600

    \frac{17}{25}=\frac{17*24}{25*24}=\frac{408}{600}\\\\\frac{23}{40}=\frac{23*15}{40*15}=\frac{345}{600}\\\\\frac{67}{120}=\frac{67*5}{120*5}=\frac{335}{600}\\\\

Leave an answer

Browse

Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )