Place Value.
Simple concept? Not for us.
When 312.07 - 67.2 is easily written as
3 1 2 . 0 7
- 6 1 . 2
then we know we've got work to do.
How would you explain how to line up in the numbers in the problem 6 - 1.2 or 54.63-9.7?
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| How do you explain "line up the numbers?" |
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