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

Toán Lớp 5: 20 × 55 + 0,21 × 55 + 20,21 × 45

Toán Lớp 5: 20 × 55 + 0,21 × 55 + 20,21 × 45

Comments ( 2 )

  1. 20 × 55 + 0,21 × 55 + 20,21 × 45
    =55×(20+0,21)+20,21 × 45
    =55×20+0,21+20,21 × 45
    =(55+45)×20,21
    =100×20,21
    =2021

  2. Giải đáp:
    20 × 55 + 0,21 × 55 + 20,21 × 45
    = 55. ( 20 + 0,21 ) + 20,21.45
    = 55.20,21 + 20,21.45
    = ( 55 + 45 ) .20,21
    = 100.20,21
    = 2021
    Chúc bạn học tốt
     

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