Question

ПОМОГИТЕ ДАМ ВСЕ БАЛЛЫ МАТЕМАТИКА

Answer 1

1) 2 1/3×(-9) = 7/3 ×(-9) = -63/3 = -21

2) -4,65-3,18 = -7,83

3) 13-(-8)-9 = 13+8-9 = 21-9 = 12

4) -1,3 ÷ 1/30 = -13/10 ÷ 1/30 = -13/10 × 30/1 = -390/10 = -39

5) 3 2/7 - 6 1/3 = 23/7 - 19/3 = 69/21 - 133/21 = -64/21