Find the difference and investigate subtraction

Finding the difference between two numbers as well as making subtraction number sentences from the numbers given.

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Remember that subtractions can also be done by subtracting the nearest whole ten and adjusting.

Write a digit in each box so that the calculation is correct. look for patterns.

Subtract a single digit from a 3-digit number with base 10 blocks.

Subtract 99 by subtracting 100 and adding 1.

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