Add and Subtract Two Digit Numbers with Number Line

A line that shows numbers in order using a scale is called a __________.

• order

• round

• number line

• estimate

Find the sum

• 60

• 50

• 510

• 76

Find the sum

• 27

• 34

• 42

• 76

• Add

• Subtract

16-9=

• 25

• 13

• 7

• 6

Add the numbers using the number line. What is the sum?

7+9 = _____

• 16

• 18

• 13

22 + 6 =

• 26

• 29

• 28

• 27

Add the numbers using the number line. What is the sum?

10+9 = _____

• 11

• 16

• 19

16 + 9 =

• 24

• 25

• 26

• 27

There were 245 birds fly to the tree. 100 more birds come and fly to the same tree. How many birds on the tree altogether?

• 345

• 324

• 234

• 343