TY  - BOOK
AU  - Nichols,Eugene D.
TI  - Pre-algebra mathematics
SN  - 030461553
U1  - 512 
PY  - 1965///
CY  - New York: 
PB  - Holt, Rinehart and Winston
KW  - Sistema numérico
KW  - Matemáticos
KW  - Divisibilidad
KW  - Factoreo
N1  - Contiene bibliografía; Numeration systems. — Base seven and base two. — Divisibility, factoring and sets. — Whole numbers and operations. — Rational and irrational numbers of arithmetic. — Per cent and its uses. — Real numbers of arithmetic. — Directed numbers- addition and subtraction. — Directes numbers- multiplication. — Basic geometric figures
ER  -