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

Toán Lớp 5: tính bằng cách hợp lý nhất 35.18+70.25+7.15.11

Toán Lớp 5: tính bằng cách hợp lý nhất
35.18+70.25+7.15.11

Comments ( 2 )

  1. 35.18+70.25+7.15.11
    =70.9+70.25+7.15.10+7.15
    =70.9+70.25+70.15+70+35
    =70.(9+35+15+1)+35
    =70.60+35
    =4200+35
    =4235
     

  2. ~ Bạn tham khảo ~
    35 * 18 + 70 * 25 + 7 * 15 * 11
    = 35 * 18 + 7 * 10 * 5*5 + 7 * 5 * 3 *11
    = 35*18 + 35*50+35*33
    = 35*(18 + 50 + 33)
    = 35*101
    = 3535

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