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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 5: 25/7 + 11/10 – 4/7 + 2/5 tính nhnah 2 p

Toán Lớp 5: 25/7 + 11/10 – 4/7 + 2/5
tính nhnah
2 p

Comments ( 2 )

  1. $\dfrac{25}{7}$ + $\dfrac{11}{10}$ – $\dfrac{4}{7}$ + $\dfrac{2}{5}$
    =($\dfrac{25}{7}$  – $\dfrac{4}{7}$) + ($\dfrac{11}{10}$+ $\dfrac{2}{5}$)
    =3 + $\dfrac{3}{2}$ =$\dfrac{9}{2}$.
    Xin hay nhất!

  2. Giải đáp:
    25/7 + 11/10 – 4/7 + 2/5 =9/2
    Trình bày lời giải:
    25/7 + 11/10 – 4/7 + 2/5
    =(25/7-4/7)+(11/10+2/5)
    =21/7+(11/10+4/10)
    =3+15/10
    =3+3/2
    =6/2+3/2
    =9/2

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222-9+11+12:2*14+14 = ? ( )