Show:
Addition
Subtraction
Before
After
Counting
20000

Solve the math problem:

4+4= ___

8

20000

Solve the math problem:

9-6=

3

20000

Number before 8

7

20000

Number after 3

4

20000

X X X X

X X X 

7

30000

Solve the math problem:

5+7=

12

30000

Solve the math problem:

10-3=

7

30000

Number before 10

9

30000

Number after 11

12

30000

X X X X X

X X X X X

10

40000

Solve the math problem:

8+3=

11

40000

Solve the math problem:

12-10=

2

40000

Number before 15

14

40000

Number after 17

18

40000

X X X X X X X

 X X X X X X

13

50000

Solve the math problem:

10+7=

17

50000

Solve the math problem:

15-5=

10

50000
Number before 20

19

50000

Number after 19

20

50000

X X X X X X

X X X X X X 

X X X X X X 

18

1000000

Solve the math problem:

2+5= ___

7

1000000

Solve the math problem:

5-4=

1

1000000

Number before 5

4

1000000

Number after 6

7

1000000

X X X X X

5