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

Toán Lớp 4: Tính bằng 2 cách : 273 nhân 145 – 273 nhân 44 – 273

Toán Lớp 4: Tính bằng 2 cách : 273 nhân 145 – 273 nhân 44 – 273

Comments ( 2 )

  1. Cách 1: 273 x 145 – 273 x 44 – 273
    = 273 x (145 – 44 – 1)
    = 273 x 100
    = 27300
    Cách 2: 273 x 145 – 273 x 44 – 273
    = 39585 – 12012 – 273
    = 27300

  2. $\text{Cách 1:}$
    273× 145 – 273 × 44 – 273
    = 273 × ( 145 – 44 – 1 )
    = 273 × 100
    = 27300
    $\text{Cách 2:}$
    273× 145 – 273 × 44 – 273
    = 39585 – 12012 – 273
    = 27573 – 273
    = 27300

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