Motion pictures and filmstrips, January-June 1970

by Library of Congress. Copyright Office

11. Fractions: Adding and subtracting numerators. © 5Dec69; MP20065.

12. Fractions: Addition & subtraction (common denominators) © 5Dec69; MP20066.

13. Adding mixed numbers. © 5Dec69; MP20067.

14. Subtracting mixed numbers. © 5Dec69; MP20068.

15. Multiplication of fractions. © 5Dec69; MP20069.

16. Multiplication of fractions: Simplifying. © 5Dec69; MP20070.

17. Multiplication of mixed numbers. © 5Dec69; MP20071.

18. Multiplying whole numbers & mixed numbers. © 5Dec69; MP20072.

19. Division of fractions. © 5Dec69; MP20073.

20. Dividing mixed numbers. © 5Dec69; MP20074.