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

Toán Lớp 6: (67,7×0,32+32,3×0,52)×(9×0,9+0,9-0,9×10) Heppp me

Toán Lớp 6: (67,7×0,32+32,3×0,52)×(9×0,9+0,9-0,9×10)
Heppp me

Comments ( 2 )

  1. Lời giải và giải thích chi tiết:
    $\text{(67,7 x 0,32 + 32,3 x 0,52) x (9 x 0,9 + 0,9 – 0,9 x 10}$
    $\text{= (67,7 x 0,32 + 32,3 x 0,62) x ( 8,1 + 0,9 – 9)}$
    $\text{= (67,7 x 0,32 + 32,3 x 0,62) x (9 – 9)}$
    $\text{= ( 67,7 x 0,32 + 32,3 x 0,62) x 0}$
    $\text{0}$

  2. (67,7xx0,32+32,3xx0,52)xx(9xx0,9+0,9-0,9xx10)
    =(67,7xx0,32+32,3xx0,52)xx[0,9xx(9+1-10)]
    =(67,7xx0,32+32,3xx0,52)xx(0,9xx0)
    =(67,7xx0,32+32,3xx0,52)xx0
    =0

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

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