4. Investigation Using the digits 0-9 (and using each digit only once in each calculation), create subtractions with the answer -9, For example, using combinations of 1 and 2-digit numbers, 3-12 = -9; 0-9 = -9; 39-48-9 - - using 2/3-digit numbers, 98-107 = -9 using 3/4-digit numbers? Try to create as many subtractions as possible with this answer. Can you - find them all, being systematic? TIP: You may like to make the cards 0-9 to help you with this activity.
4. Investigation Using the digits 0-9 (and using each digit only once in each calculation), create subtractions with the answer -9, For example, using combinations of 1 and 2-digit numbers, 3-12 = -9; 0-9 = -9; 39-48-9 - - using 2/3-digit numbers, 98-107 = -9 using 3/4-digit numbers? Try to create as many subtractions as possible with this answer. Can you - find them all, being systematic? TIP: You may like to make the cards 0-9 to help you with this activity.
Algebra: Structure And Method, Book 1
(REV)00th Edition
ISBN:9780395977224
Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Chapter2: Working With Real Numbers
Section2.3: Rules For Addition
Problem 7P
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