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

Toán Lớp 6: a ) 162 + 457 + 173 + 227 + 525 + 438 b ) 25.6 + 5.5.29 – 45.5

Toán Lớp 6: a ) 162 + 457 + 173 + 227 + 525 + 438
b ) 25.6 + 5.5.29 – 45.5

Comments ( 2 )

  1. Giải đáp + Lời giải và giải thích chi tiết:
    a, 162+457+173+227+525+438
    =(162+438)+(227+173)+(457+525)
    =600+400+982
    =1000+982
    =1982
    b, 25.6+5.5.29-45.5
    =25.6+25.29-9.5.5
    =25.6+25.29-9.25
    =25.(6+29-9)
    =25.26
    =650

  2. Answer
    a, 162 + 457 + 173 + 227 + 525 + 438
    = (162 + 438) + (227 + 173) + (457 + 525)
    = 600 + 400 + 982
    = 1000 + 982
    = 1982
    ___________________
    25 xx 6 + 5 xx 5  xx 29 – 45 xx 5
    = 25 xx 6 + 25 xx 29 – 25 xx 9
    = 25 xx (6 + 29 – 9)
    = 25 xx (35 – 9)
    = 25 xx 26
    = 650

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