2. a) 1250 = 10 * 125
470 = 10 * 47
80 = 10 * 8
35 280 = 10 * 35 28
121 230 = 10 * 121 23
41 000 = 10 * 41 00
b) 4 000 = 100 * 40
500 = 100 * 5
13 700 = 100 * 137
24 500 = 100 * 245
30 000 = 100 * 300
c) 7 000 = 1000 * 7
21 000 = 1000 * 21
212 000 = 1000 * 212
220 000 = 1000 * 220
6 000 = 1000 * 6
3. 1 724 = ( 1* 1000 ) + ( 7*100 ) + (2*10 ) + 4
3 536 = ( 3*1000) + ( 5 *100 ) + (3*10) +6
4 889 = (4*1000) + (8*100) + ( 8*100) +9
6 346 = ( 6*1000 ) + ( 3*100 ) + ( 4*10) +6
