ISBN-13: 9780721708539 / Angielski / Miękka / 2016 / 48 str.
ISBN-13: 9780721708539 / Angielski / Miękka / 2016 / 48 str.
Designed for use with the Mental Arithmetic Introductory Book, this book provides answers to the tests featured in the pupil's book and includes guidance notes for referral.