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8 | 6 | 1 | ||
+ | ? | ? | ? | |
1 | 4 | 2 | 7 |
b | b | |
+ | c | b |
a | c | c |
What must "F" be?
What does that tell you about "T"?
Are you certain you have considered all the possibilities?
Suggest students start with Spell by Numbers
Suggest students find other word sums that work.
Here are some possibilities that they might consider:
Why are some impossible?
Can they make a word subtraction?
Choose two digits and arrange them to make two double-digit numbers. Now add your double-digit numbers. Now add your single digit numbers. Divide your double-digit answer by your single-digit answer. Try lots of examples. What happens? Can you explain it?
What do the digits in the number fifteen add up to? How many other numbers have digits with the same total but no zeros?