Maryland Math 4.NOS.C.7.a

Math4th GradeNumber and Operation Sense

The Standard

4.NOS.C.7: Recall or quickly derive multiplication and division facts within 100 (e.g., factors less than or equal to 10 and quotients less than are equal to 10).

Skip count (2s, 5s, 10s) and apply properties of operations (0s, 1s) to derive foundational facts.

Maryland College and Career Ready Standards for Mathematics (2025) · GAIN FAMILIARITY WITH FACTORS AND MULTIPLES.

Teacher's field guide

What Students Need to Do: Students skip count by 2s, 5s, and 10s to find multiplication facts. They use groups to work out facts with 0 and 1.
What Mastery Looks Like: A student counts 5, 10, 15, 20, 25, 30 to solve 6 × 5. They explain that 6 × 0 means six empty groups and 6 × 1 means six groups of one.
Common Misconceptions: Some students answer 7 × 5 with 12 because they add the two numbers. Others think 7 × 0 is 7 or 7 × 1 is 8 because they add instead of multiply.
How to Assess It: Exit ticket: Solve 6 × 2, 6 × 5, 6 × 10, 6 × 0, and 6 × 1. Show skip counts for the first three and draw groups for the last two.

Lesson moves

Give students counters and cups to build six groups of two, five, and ten, then six groups of zero and one.
Ask: Why does 8 × 0 equal zero, but 8 × 1 equals eight? Have students draw groups for each.
Play fact bingo: call out multiplication facts with 0, 1, 2, 5, and 10 while students cover the products.
Use a price list with $2 stickers, $5 notebooks, and $10 games; find the cost of zero, one, and six of each.

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