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

Toán Lớp 5: tính nhanh: 12, 12 x 4,5 + 5,5 x 12,12

Toán Lớp 5: tính nhanh:
12, 12 x 4,5 + 5,5 x 12,12

Comments ( 2 )

  1. 12,12xx4,5+5,5xx121,12
    =12,12xx(4,5+5,5)
    =12,12xx10
    =121,2
     

  2. $\text{12,12 x 4,5 + 5,5 x 12,12}$$\\$$\text{= 12,12 x (4,5 + 5,5 )}$$\\$$\text{= 12,12 x 10}$$\\$$\text{= 121,2}$

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