1) м=26520:65=408
2)4z=26+22
4z=48
z=48:4=12
1) 1 час = 60 мин. 1/10 = 60÷10×1. 1/10 = 6 минут.
2) 3/4 часа = (60÷4)×3 = 15×3=45
3) 1/3 27 = 27÷3×1 = 9×1 = 9
4) 3/4 60 = 60÷4×3 = 15×3= 45
81%=42.3
100%=х
х=42.3*100:81
х=4230:81
х=52 18/81
52 18/81=100%
у=18%
у=52 18/81*18:100
у=4230/81*18:100
у=940:100
у=9.4
Ответ: 9.4
- 4,3 : х = - 14,62
х = - 4,3 : ( - 14,62 )
х = ( 43/10 ) : ( 1462/100 )
х = ( 43/10 ) : ( 731/50 )
х = ( 43•50)/(10•731)
х = 2150/7310
х = 215/731
4 1/2 - 9 = 9/2 - 9 =<span>(9 × 1 - 9 × 2)/2 = 9/2 - 18/2 = - 9/2 = - 4 1/2</span>