Выполни вычисления: 1) 45+7=62 64+6=70 2) 70÷(15⅓-9)=76 76-9=64 30-8=22 80÷(16⅔-7)=41

Решение:

1. 45 + 7 = 52


2. 64 + 6 = 70


3. \( 15 \frac{1}{3} - 9 = \frac{46}{3} - \frac{27}{3} = \frac{19}{3} \)


4. \( 70 \div \frac{19}{3} = 70 \times \frac{3}{19} = \frac{210}{19} \)


5. 76 - 9 = 67


6. 30 - 8 = 22


7. \( 16 \frac{2}{3} - 7 = \frac{50}{3} - \frac{21}{3} = \frac{29}{3} \)


8. \( 80 \div \frac{29}{3} = 80 \times \frac{3}{29} = \frac{240}{29} \)

Ответ: 1) 52, 70; 2) \( \frac{210}{19} \), \( \frac{240}{29} \).