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

Toán Lớp 6: / Tính hợp lý : 12 + (-91) + 188 + (-9) + 400

Toán Lớp 6: / Tính hợp lý : 12 + (-91) + 188 + (-9) + 400

Comments ( 2 )

  1. 12 + ( -91 ) + 188 + ( -9 ) + 400
    = 12 – 91 + 188 – 9 + 400
    = ( 12 + 188 ) + ( -91 – 9 ) + 400
    = 200 + ( -100 ) + 400
    = 100 + 400
    = 500

  2. 12 + (- 91) + 188 + (- 9) + 400
    = (12 + 188) + (- 91 – 9) + 400
    = 200 +( – 100) + 400
    = 100 + 400
    = 500

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

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