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

Toán Lớp 5: tính nhanh: $\frac{25×4×99×1}{100×198×2}$

Toán Lớp 5: tính nhanh: $\frac{25×4×99×1}{100×198×2}$

Comments ( 2 )

  1. {25 × 4 × 99 × 1}/{100 × 198 × 2}

    = {25 × 4 × 99}/{25 × 4 × 99 × 2 × 2}

    = 1/4

     

  2. Giải đáp và lời giải

    (25xx4xx99xx1)/(100xx198xx2)

    =(100xx99)/(100xx99xx2xx2)

    =(100xx99)/(100xx99)xx1/(2xx2)

    =1xx1/4

    =1/4

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