ISBN-13: 9780721708089 / Angielski / Miękka / 2016 / 48 str.
ISBN-13: 9780721708089 / Angielski / Miękka / 2016 / 48 str.
Designed for use with the Mental Arithmetic Book 4, this book provides answers to all the tests featured in the pupil's book and includes guidance notes for referral.