Lesson XXI

REVIEW

Review of Addition problems using numbers TWO through TEN; adding three numbers at a time. (Sorry, no story problems in this one!)


ADDITION.

LESSON XXI.

REVIEW.

1. How many are  2  and  4 ?

SOLUTION.–2  and  4  are  6.

2. How many are  3  and  5 ?     4  and  7 ?

3. How many are  6  and  4 ?     3  and  8 ?

4. How many are  2  and  9 ?     8  and  2 ?

5. How many are  2  and  10 ?     7  and  2 ?

6. How many are  3  and  3 ?     4  and  4 ?

7. How many are  5  and  4 ?     6  and  5 ?

8. How many are  2  and  5 ?     3  and  10 ?

9. How many are  10  and  4 ?     3  and  9 ?

10. How many are  6  and  7 ?     7  and  5 ?

11. How many are  4  and  8 ?     5  and  9 ?

12. How many are  10  and  6 ?     9  and  7 ?

13. How many are  7  and  7 ?     6  and  6 ?

14. How many are  8  and  6 ?     10  and  7?

15. How many are  2  and  6 ?     6  and  9 ?

16. How many are  9  and 4 ?     10  and  9?

17. How many are  10  and  8 ?     5  and  8 ?

18. How many are  8  and  7 ?     2  and  2 ?

19. How many are  5  and  5 ?     7  and  3 ?

20. How many are  8  and  8 ?     9  and  9 ?

21. How many are  4  and  3 ?     2  and  3 ?

22. How many are  5  and  10 ?     8  and  9 ?

***********

23. How many are  2  and  2  and  2 ?

SOLUTION.– 2  and  2  and  2  are  4;  4  and  2  are  6.

24. How many are  4  and  4  and  4 ?     5  and  5  and  5 ?

25. How many are  6  and  4  and 6 ?     2  and  6  and  8 ?

26. How many are  3  and  5  and  7 ?     4  and  5  and  9 ?

27. How many are  6  and  2  and  9 ?     5  and  2  and  3 ?

28. How many are  3  and  5  and  9 ?     4  and  4  and  6 ?

29. How many are  4  and  6  and  7 ?     3  and  8  and  9 ?

30. How many are  2  and  3  and  2 ?     2  and  6  and  7 ?

(23) ff

Rays woodcutborder


Back to Primary Math

Go to Lesson XXII, pt. 1

Return to Ray’s Arithmetic Home

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