00507nam a2200181 a 450000100060000000300080000600500170001400800410003103500190007204000270009104100080011808200220012610000310014824500550017926000450023430000310027965000150031068827BD-RjUL20211209081820.0971113s1961    enka          000 0 eng d  a(BD-RjUL)69038  aEQOcEQObengdBD-RjUL  aeng  223a513bMOF 19611 aMott, E. M.q(Ethel Maud).10aFirst steps in practical number work /cE. M. Mott  aLondon :bEvans Brothers limited,c1961.  a128  p.  :bill. ;c21 cm.  aArithmetic