Many useful procedures explained and taught: 2-column addition, left-to-right subtraction, direct multiplication by numbers greater than 12, mental division of large numbers, more. Also numerous helpful shortcuts. More than 8,000 problems, with solutions.
Ik heb een vraag over het boek:
‘How to Calculate Quickly - Sticker, Henry’.
Vul het onderstaande formulier in.
We zullen zo spoedig mogelijk antwoorden.
