1) 3r
3 = 3•1; 6 = 3•2; 30 = 3•10.
2) 4r
4 = 4•1; 60 = 4•15; 400 = 4•100.
3)7r
7 = 7•1; 35 = 7•5; 7000 = 7•1000.
4) 11r
11 = 11•1; 22 = 11•2; 99 = 11•9;
1) 3r
3 = 3•1; 6 = 3•2; 30 = 3•10.
2) 4r
4 = 4•1; 60 = 4•15; 400 = 4•100.
3)7r
7 = 7•1; 35 = 7•5; 7000 = 7•1000.
4) 11r
11 = 11•1; 22 = 11•2; 99 = 11•9;