Add
20+20
what is the number:40
40-20
what is the number:20
20x2x2
what is the number:80
80/(2x2)
what is the number:20
200+200
what is the number:400
400-200
what is the number:200
200x2x2
what is the number:800
800/(2x2)
what is the number:200
2,000+2,000
what is the number:4000
4,000-2,000
what is the number:2,000
2,000x2x2
what is the number:8,000
8,000/(2x2)
what is the number:2,000
20,000+20,000
what is the number:20000
40,000-20,000
what is the number:20,000
20,000x2x2
what is the number:80,000
80,000/(2x2)
what is the number:20,000
200,000+200,00
what is the number:400,000
400,000-200,000
what is the number:200,000
200,000x2x2
what is the number:800,000
800,000/(2x2)
what is the number:200,000