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

Toán Lớp 6: tính nhanh 14x35x5+10x25x7+20×70

Toán Lớp 6: tính nhanh 14x35x5+10x25x7+20×70

Comments ( 2 )

  1. 14×35×5+10×25×7+20×70
    = 70×35+25×70+20×70
    = 70×(35+25+20)
    = 70×80
    = 5600

  2. 14 × 35 × 5 + 10 × 25 × 7 + 20 × 70
    = 14 × 5 × 35 + 10 × 7 × 25 + 20 × 70
    = 70 × 35 + 70 × 25 + 20 × 70
    = 70 × (35 + 25 + 20)
    = 70 × 80
    = 5600
     

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