Question

21/65×45/28= 9 3/7 × 1 3/11= 0,375×4 4/15= (1 7/24 - (3/4×3/4))×1 11/21 - 1 1/15=

Answer 1

1) $\frac{21}{65} * \frac{45}{28} = \frac{27}{52}$

2) $\frac{66}{7} * \frac{14}{11} = 12$

3) $\frac{375}{1000} * \frac{64}{15} = \frac{200}{125} = 1\frac{75}{125} = 1,6$

4) $(\frac{31}{24} - \frac{9}{16}) * \frac{32}{21} - \frac{16}{15} = \frac{62}{48} - \frac{27}{48} = \frac{35}{48} * \frac{32}{21} = \frac{10}{9} - \frac{16}{15} = \frac{50}{45} - \frac{48}{45} = \frac{2}{45}$

НОЗ: 48. НОЗ: 45.

Answer 2

1)=3/13*9/4=27/52
2)66/7*14/11=6*2=12
3)3/8*64/15=8/5=1 3/5 или 1.6
4)(17/24-9/16)*32/21-11/15=7/48 * 32/21-11/15=2/9-11/15=-23/45 или -0.5