Show:
Addition
Subtraction
Repeated Addition
Arrays
100

5 + 4 =

9

100

5 - 3 =

2

100

3 + 3 + 3 + 3 =

12

100

Which way do columns go?

Up and Down

200

10 + 8 =

18


200

15 - 5 =

10

200

5 + 5 + 5 =

15

200

Which way do rows go?

Side to Side

300

15 + 8 =

23

300

17 - 8 =

9

300

2 + 2 + 2 + 2 + 2 + 2 =

12

300

XXXX

XXXX

How many rows do I have?

2

400

23 + 23 =

46

400

23 - 15 =

8

400

4 + 4 + 4 + 4 =

16

400

XXXX

XXXX

How many columns do I have?

4

500

345 + 200 =

545

500

550 - 50 =

500

500

10 + 10 =

20

500

XXXX

XXXX

What is the repeated addition for rows in my array?

4 + 4 = 8