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

Toán Lớp 7: (-1/2)mũ 2 × 4/11 +7/11 × (-1/2)mũ 2

Toán Lớp 7: (-1/2)mũ 2 × 4/11 +7/11 × (-1/2)mũ 2

Comments ( 2 )

  1. Answer
    (-1/2)^2 xx 4/11 + 7/11 xx (-1/2)^2
    = (-1/2)^2 xx (4/11 + 7/11)
    = 1/4 xx 1
    = 1/4

  2. (-1/2)²xx4/11+7/11xx(-1/2)²
    = (-1/2)²xx(4/11+7/11)
    = 1/4xx11/11
    = 1/4xx1
    = 1/4

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