Math shortcuts
Locke, Flora M
Math shortcuts - New York John Wiley and sons, icn. 1972 - vii,166p.; 26cm. - Wiley self -teaching guides .
471543284
Decimal fractions
Higher terms
Multiplication
Ready reckoners
Math shortcuts - New York John Wiley and sons, icn. 1972 - vii,166p.; 26cm. - Wiley self -teaching guides .
471543284
Decimal fractions
Higher terms
Multiplication
Ready reckoners