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

Toán Lớp 5: Tìm y, biết a. 8,53 – y= 2,47 b. 7+y= 13,98 c.8,125+y =9

Toán Lớp 5: Tìm y, biết
a. 8,53 – y= 2,47
b. 7+y= 13,98
c.8,125+y =9

Comments ( 2 )

  1. 8,53-y=2,47
    y=8,53-2,47
    y=6,06
    Vậy y=6,06
    _______________________________
    7+y=13,98
    y=13,98-7
    y=6,98
    Vậy y=6,98
    _______________________________
    8,125+y=9
    y=9-8,125
    y=0,875
    Vậy y=0,875

  2. Lời giải và giải thích chi tiết:
    $\text{a) 8,53 – y = 2,47}$
    $\text{y = 8,53 – 2,47}$
    $\text{y = 6,06}$
    $\text{b) 7 + x = 13,98}$
    $\text{x = 13,98 – 7}$
    $\text{x = 6,98}$
    $\text{c) 8,125 + y = 9}$
    $\text{y = 9 – 9,125}$
    $\text{y = 0,875}$

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