Counting to 20
One-to-One Counting
Addition & Subtraction with Unknowns
Properties of Addition
2 Digit Numbers
100

Count out loud from 1 to 10.

1,2,3,4,5,6,7,8,9,10!

100

If you count 7 blocks, how many blocks do you have?

7

100

5 + ___ = 8

3

100

Is 3 + 5 the same as 5 + 3?

Yes

100

How many tens are in 14?

1 ten 

200
What number comes after 14?

15

200

You point to each toy once and count 9 toys. How many toys are there?

9

200

___ + 4 = 10

6

200

Is 4 + 6 the same as 6 + 4?

Yes

200

What number has 2 tens and 3 ones?

23

300

What number comes before 20?

19

300

If you skip a block while counting, did you use one-to-one counting?

No
300

9 - ___ = 5

4

300

7 + 3 = 3 +___

7

300

Which number is bigger: 19 or 91?

91

400

Count by ones starting at 8. What is the 5th number you say?

12

400

You count 12 crayons and touch each one. How many crayons are there?

12

400

____ - 3 = 7

10

400

Is 7 + 3 the same as 3 + 6? How do you know?

No, because when you add the numbers, you get different totals. 

400

Draw or tell how many tens and ones are in 47.

4 tens 7 ones

500

Start at 7 and count by ones until you reach 17

7,8,9,10,11,12,13,14,15,16,17!

500

If Ms. Dents gives you 15 counters. You touch and count each one. How many counters do you have at the end?

15

500

___ + 8 = 14

6

500

If you add zero to the number 6, would the answer be 10? Explain your answer.

No! When you add zero to a number, the number stays the same because zero means “nothing added.” 

500

You have 3 tens and 6 ones. What number is that?

36