1. Вычисли. 1) 5*6 5*9+5 4*8-30 25:5+10 8*5 7*5+6 9*3-12 24:3+17 5*4 3*5+8 9*4+5 18:3+24 2) 25-(24-8) 60-(27-4) 100-52 40-(13+8) 35-(13-9) 100-65

Решение:

1. 1)
   • \[ 5 \times 6 = 30 \]
   • \[ 5 \times 9 + 5 = 45 + 5 = 50 \]
   • \[ 4 \times 8 - 30 = 32 - 30 = 2 \]
   • \[ 25 : 5 + 10 = 5 + 10 = 15 \]
   • \[ 8 \times 5 = 40 \]
   • \[ 7 \times 5 + 6 = 35 + 6 = 41 \]
   • \[ 9 \times 3 - 12 = 27 - 12 = 15 \]
   • \[ 24 : 3 + 17 = 8 + 17 = 25 \]
   • \[ 5 \times 4 = 20 \]
   • \[ 3 \times 5 + 8 = 15 + 8 = 23 \]
   • \[ 9 \times 4 + 5 = 36 + 5 = 41 \]
   • \[ 18 : 3 + 24 = 6 + 24 = 30 \]
2. 2)
   • \[ 25 - (24 - 8) = 25 - 16 = 9 \]
   • \[ 60 - (27 - 4) = 60 - 23 = 37 \]
   • \[ 100 - 52 = 48 \]
   • \[ 40 - (13 + 8) = 40 - 21 = 19 \]
   • \[ 35 - (13 - 9) = 35 - 4 = 31 \]
   • \[ 100 - 65 = 35 \]

Ответ: 1) 30, 50, 2, 15, 40, 41, 15, 25, 20, 23, 41, 30; 2) 9, 37, 48, 19, 31, 35