b'Mathematics Working Chart Equation Paper500 sheets with 10 rows of 5 squares printed in black on white paper. Used for memorization exercises.Item Number: 558600$31.95 Subtraction TablesThe Subtraction Tables contain the equations necessary for performing the Subtraction Strip Board exercises. 18 sheets per set, 10 complete sets provided.Item Number: 014301$21.95 Problem Slips: Subtraction Working Charts2 sets of colour-coded unit subtraction combinations (equations) slips. 1 set of combinations for each of the 2 Subtraction Working Charts. Each set supplied in separate plastic box.Item Number: 559534$44.95 Subtraction Tables Subtraction Tables Subtraction Tables Booklet: 1 Booklet: 2 Booklet: 3The traditional subtraction tables forSubtraction tables 18-1 presentedA booklet with random subtraction the numbers 18-1 with subtrahendswith subtrahends in random order.equations. These booklets encourage in diminishing numerical orderThese booklets encourage furtherfurther practice and repetition (24 booklets). practice and repetition (24 booklets). (40 booklets).Item Number: 559531 Item Number: 559532 Item Number: 559533$36.95 $36.95 $36.95Nienhuis Montessori 71'