Skip Counting by 2 or 3
Skip Count by 5 or 10
Can you decompose?
Story Problems
Add or Subtract
100

Fill in the missing numbers:

2, 4, 6, ____, ____, ____

2, 4, 6, 8, 10, 12

100

Fill in the missing numbers: 

0, 5, 10, 15, ____, ____, ____

0, 5, 10, 15, 20, 25, 30

100

Decompose this number into 10's and 1's: 

15

15

(10+5)

100

Hansel and Gretel found a beautiful patch of flowers. They wanted to return to it at the 5th pebble along the path. How many steps were they from their house?

They were 50 steps from their house. 

100

13+5=?

13+5=18

200

Fill in the missing numbers: 

7, ____, 11, 13, ____

7, 9, 11, 13, 15

200

Fill in the missing numbers: 

35, ____, ____, 50, 55, ____

35, 40, 45, 50, 55, 60

200

Decompose this number into 10's and 1's: 

67

67

(60+7)

200

There were 5 students in the Zoom call. 13 more joined two minutes later. How many students are there now?

There are 18 students now. 

200

25+30=?

25+30=55

300

Fill in the missing numbers: 

4, 7, _____, _____, _____

4, 7, 10, 13, 16

300

Fill in the missing numbers: 

13, 23, ____, ____, ____

13, 23, 33, 43, 53

300

Decompose to make it easier to add: 

15+25

15+25

(10+5)+(20+5)

So you can add tens and ones: 

(10+20)+(5+5)

300

Joe is 16 inches taller than his little brother. If his little brother is 31 inches tall, how tall is Joe?

Joe is 47 inches tall. 

300

65-20=?

65-20=45

400

Fill in the missing numbers:

____, ____, 35, 38, ____

29, 32, 35, 38, 41

400

Fill in the missing numbers: 

____, ____, ____, 117, 127

87, 97, 107, 117, 127

400

Decompose to make it easier to add: 

37+13

37+13

(30+7)+(10+3)

So we can add the tens and the ones:

(30+10)+(7+3)

400

There were 12 penguins on the ice. Some penguins joined them to get warm. Then 5 went fishing. Now there are 27 penguins on the ice. How many joined them in the beginning?

20 penguins joined them in the beginning. 

400

_____+35=47

12+35=47

500

Fill in the missing numbers: 

99, ____, ____, 105, ____

99, 101, 103, 105, 107

500

Fill in the missing numbers: 

67, _____, _____, _____, 87, 92

67, 72, 77, 82, 87, 92

500

Decompose to make adding easier: 

26+18


26+18

(20+6)+(10+4+4) So the 6 and 4 can make a ten

Or...

(20+4+2)+(10+8) So the 8 and 2 can make a 10

Do you have a different way?

500

How many pebbles did Hansel and Gretel use at the 120th step? 

They used 12 pebbles. 

500

78-____=56

78-22=56