study

what is the common factors of 3,9 and 15

• 9

• 15

• 36

• 45

Addition

5+8=

78+82=?

• 639

• 160

• 32

• 45

4+3=?

• 7

• 4

• 9

• 3

6+26

• 12

• 22

• 32

What addition problem do these base ten blocks represent?

• 35+29
• 28+39
• 29+38
• 38+29

50x50

1x1

• 1

• 2

• 3

• 11

2x0

• 0

• 2

• 1

• 55

11x11

• 121

• 21

• 212

• 12