Doubles
Doubles Plus 1
Make a 10
100

5+5

10

100

5+5+1

11

100

8+5

10+3

200

6+6

12

200

6+6+1

13

200

9+2

10+1

300

7+7

14

300

7+7+1

15

300

7+9

10+6

400

8+8

16

400

8+8+1

17

400

Antonio had 8 brownies. He made 6 more brownies. What is another way to show this adding problem as a 10 and some ones?

10+4

500

9+9

18

500

9+9+1

19

500

Jessica won 3 trophies. Next year, she won 9 more trophies. What is another way to write this adding problem as a 10 and some ones and how many trophies does Jessica have in all?

10+2=12