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Doubles
Doubles
Base 10
100

Count by 2s all the way to 100

2,4,6,8,10...

100

Double of 1

2

100

Double of 6

12

100

How many tens and ones are there in 55

5 tens (50) 

5 ones (5)

200

Count by 5s all the way to 100

5,10,15,20...

200

Double of 2

4

200

Double of 7

14

200

How many tens and ones in the number 62?

6 tens (60) 

2 ones (2)

300

Count by 10 all the way to 100

10,20,30,40,50...

300

Double of 3

6

300

Double of 8

16

300

How many 100s 10s and 1s in the number 138

1 100s (100)

3 10s (30)

8 1s (8)

400

Count by 20 all the way to 100

20,40,60...

400

Double of 4

8

400

Double of 9 

18

500

Count by 25 all the way to 100

25,50,75,100

500

Double of 5

10

500

Double of 10

20