This math skill teaches determining the ones digit of a product in a multiplication problem where each letter represents a unique digit. The focus is on understanding that only the ones place affects the resulting ones digit, which can be any even number including zero.
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Ones digit of a multiplication, solving a product
Test your understanding of ones digit in product of a multiplication by practicing it! Work through the below exercises to use it in practice.
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If each letter represents a digit from 0 to 9, what might the digit marked with a question mark be?
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We know that the question mark is in the ones place, and is the result of multiplying 2 and some digit. Only the ones place multiplication will affect our mystery digit.
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Multiplying 2 and any digit gives us all the even numbers as options.
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So the mystery digit can be 2, 4, 6, 8, or zero.