Breakthrough to math :
Breakthrough to math : subtracting whole numbers, level 1, book 3 worksheet /
edited by Ann K. U. Tusing.
- Syracuse, NY : Readers Press, 1978.
- 62 p. ; ill.
0-88336-812-9
Mathematics - - study and teaching
Subtraction
TR(GS 510.7 / BRE L1
0-88336-812-9
Mathematics - - study and teaching
Subtraction
TR(GS 510.7 / BRE L1