1- bis 5-stellige Addition und Subtraktion (Klasse 2-4): ?er 3000 ?ungen mit L?ungsschl?sel - Kinder im Alter von 7-9 Jahren - Einstellige, zweist (Paperback)
1- to 5-Digit Addition and Subtraction (Grade 2-4): Over 3000 Exercises with Answer Key Included - Kids Aged 7-9 - One Digit, Double Digits, Triple Di (Paperback)
1- to 5-Digit Multiplication and Division (Kids Aged 10-13): Over 3000 Exercises with Answer Key Included - Grade 5-8 - One Digit, Double Digits, Trip (Paperback)