Question

45x16-17/45x15+28

Answer 1

Dấu chấm chính là dấu nhân đó nha :))

\(\frac{45.16-17}{45.15+28}=\frac{45.\left(15+1\right)-17}{45.15+28}=\frac{45.15+45-17}{45.15+28}=\frac{45.15+28}{45.15+28}=1\)

Answer 2

\(\frac{45\times16-17}{45\times15+28}=\frac{45\times\left(15+1\right)-17}{45\times15+28}=\frac{45.15+45-17}{45\times15+28}=\frac{45\times15+28}{45\times15+28}=1.\)

Answer 3

45 × 16 − 17 45 × 15 + 28 = 45 × ( 15 + 1 ) − 17 45 × 15 + 28 = 45.15 + 45 − 17 45 × 15 + 28 = 45 × 15 + 28 45 × 15 + 28 = 1.