1)
a . 40 : 10 = 4
400 : 10 = 40
4000 ÷ 10 = 400
b. 60 ÷ 10 = 6
600 ÷ 100 = 6
6000 ÷ 1000 = 6
c . 45000 ÷ 100 = 450
45000 ÷ 1000 = 45
45000 ÷ 10 = 4500
d. 324000 ÷ 10 = 32400
324000 ÷ 100 = 3240
324000 ÷ 1000 = 324
2)
400 ÷ 100 = 4
6000 ÷ 100 = 60
21000 ÷ 100 = 210
140000 ÷ 100 = 1400
3)
9000 ÷ 1000 = 9
99000 ÷ 1000 = 99
909 ÷ 1000 = 0.909
900000 ÷ 1000 = 900
