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

Toán Lớp 5: 3) Tính giá trị bểu thức 100-369,58:6,8+11,56 4 ) Tính nhanh 16×48+8×48+32×14

Toán Lớp 5: 3) Tính giá trị bểu thức
100-369,58:6,8+11,56
4 ) Tính nhanh
16×48+8×48+32×14

Comments ( 2 )

  1. Answer
    3) 100 – 369,58 : 6,8 + 11,56
    = 100 – 54,35 + 11,56
    = 45,65 + 11,56
    = 57,21
    ____________________
    4) 16 xx 48 + 8 xx 48 + 32 xx 14
    = 2 xx 8 xx 48 + 8 xx 48 + 8 xx 4 xx 14
    = 8 xx 96 + 8 xx 48 + 8 xx 56
    = 8 xx (96 + 48 + 56)
    = 8 xx (144 + 56)
    = 8 xx 200
    = 8 xx 100 xx 2
    = 800 xx 2
    = 1600

  2. 3)
    100 – 369,58 : 6,8 + 11,56
    = 100 – 54,35 + 11,56
    = 45,65 + 11,56
    = 57,21
    4)
    16 × 48 + 8 × 48 + 32 × 14
    = 48 × ( 16 + 8 ) + 32 × 14
    = 48 × 24 + 32 × 14
    = 48 × ( 14 + 10 ) + 32 × 14
    = 48 × 14 + 48 × 10 + 32 × 14
    = 14 × ( 48 + 32 ) + 48 × 10
    = 14 × 80 + 480
    = 1120 + 480
    = 1600
     

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

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