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

Toán Lớp 9: Tính nhanh : `(988-12-5. 12).(99+88+77+66)`

Toán Lớp 9: Tính nhanh :
(988-12-5. 12).(99+88+77+66)

Comments ( 2 )

  1. $(988 – 12  -5.12).(99 + 88 + 77 + 66)$
    $=[988 – 12.(1 + 5)].11.(9 + 8 + 7 + 6)$
    $=(988 – 12.6).11.30$
    $=(988 – 72).330$
    $=916.330$
    $=302280$ 
     

  2. Giải đáp:
    (988-12-5.12).(99+88+77+66)
    = [988+12.(-1-5)].11.(9+8+7+6)
    = [988 + 12.(-6)].11.30
    = (988 – 72).330
    =916.330=302280
     

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