Common Core: 1.OA.C.6
Problem 8 of 27g1-008
Ella has 6 stars. Ben has 7 stars. How many stars do they have in all?
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Solution walkthrough0:44
- Ella has 6 red stars. Ben has 7 blue stars.
- Make pairs and count by twos: 2, 4, 6, 8, 10, 12. Six and six is a double: 12.
- Ben has 1 more star. 12 and 1 more is 13. So 6 and 7 make 13.
- 7 is one more than 6. Find the double, then add one more. Great thinking!