Question

Помогите!!!!!!!!!!!!!!!! там отмечено галочкой

Answer 1

1. 9900/110=90
2 и 3 хз

Answer 2

110 x x = 9900
x = 9900 : 110
x = 90
110 x 90 = 9900
      9900 = 9900

1800 : z = 45
z = 1800 : 45
z = 40
1800 : 40 = 45
           45 = 45