Multiplying a one-digit number by a multiple of ten, such as 4 x 80 or 6 x 30, is a bridge between basic facts and larger multiplication. Third graders already know that 4 x 8 is 32, and this skill asks them to notice that 80 is 8 tens, so 4 groups of 80 make 32 tens, which is 320. A common mistake is treating the extra zero as a rule to memorize rather than a result of place value, so a child may add a zero to the wrong number or forget it entirely on a harder problem. This worksheet keeps the underlying one-digit fact visible next to the multiple-of-ten problem so your child can see where the zero comes from every time.
Items rotate through direct products, problems that show the small fact first, a missing multiple-of-ten factor, word problems about equal groups, and a short explanation of why the extra zero appears. Support versions use smaller one-digit factors and multiples of ten up to fifty. Standard versions use larger one-digit factors and multiples of ten up to ninety. Challenge versions use the biggest facts, put the multiple of ten first, and add two-step word problems. Encourage your child to solve the small fact first, then ask how many tens the multiple of ten represents before writing the final answer.
What your child will learn
Multiply a one-digit number by a multiple of ten
Use a known basic fact to find a larger product
Explain why the product ends in a zero
Find a missing multiple-of-ten factor
Worked example
4 x 8 = 32, and 80 is 8 tens, so 4 x 80 = 32 tens, which is 320.
Common mistake
Adding a zero to the wrong number, or forgetting the zero on a harder problem.
Helpful hint
Solve the one-digit fact first, then think about how many tens you have.
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