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

Toán Lớp 5: Tính : 62,59 x 86 + 639,27 x 57 + 894,92 x 43 + 306,73 x 57

Toán Lớp 5: Tính : 62,59 x 86 + 639,27 x 57 + 894,92 x 43 + 306,73 x 57

Comments ( 2 )

  1. $\textit{Giải đáp + Lời giải và giải thích chi tiết:}$
    $62,59×86+639,27×57+894,92×43+306,73×57$
    $=62,59×2×43+639,27×57+894,92×43+306,73×57$
    $=125,18×43+639,27×57+894,92×43+306,73×57$
    $=(125,18×43+894,92×43)+(639,27×57+306,73×57)$
    $=43×(125,19+894,92)+57×(639,27+306,73)$
    $=43 × 1020,1 + 57 × 946$
    $=43864,3+53922$
    $=97786,3$

  2. 62,59 xx 86 + 639,27 xx 57 + 894,92 xx 43 + 306,73 xx 57
    = 62,59 xx 2 xx 43 + 639,27 xx 57 + 894,92 xx 43 + 306,73 xx 57
    = 125,18 xx 43 + 639,27 xx 57 + 894,92 xx 43 + 306,73 xx 57
    = ( 125,18 + 894,92 ) xx 43 + ( 639,27 + 306,73 ) xx 57
    = 1020,1 xx 43 + 946 xx 57
    = 43864,3 + 53922
    = 97786,3
    #dtkc

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

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