Max Rescues the Block Tower: Subtraction Sprint!

About this Grade 2 Subtraction Drill

Subtraction is one of the most practical math skills your second grader will use every single day. From figuring out how many cookies are left after sharing with a friend, to counting remaining allowance after buying a toy, subtraction helps children make sense of the world around them. At age 7-8, students are developing the ability to work with numbers in their head and on paper, building the foundation for multi-digit subtraction they'll encounter in third grade. When children master subtraction facts and strategies now, they gain confidence in problem-solving and develop number sense—the ability to understand how numbers relate to each other. This drill strengthens mental math skills, helps students recognize patterns in number relationships, and prepares them for more complex mathematics ahead. Fluency with subtraction also frees up mental energy so kids can focus on harder math concepts later.

What your student will practice

• Subtract within 20 using mental strategies and counting back
• Recognize and apply the relationship between addition and subtraction
• Solve subtraction word problems within 20 with accuracy
• Build automaticity with subtraction facts for faster recall

Common mistakes to watch for

Second graders often count incorrectly when using a "counting back" strategy—they skip the starting number or lose track mid-count. For example, when solving 12 - 3, a child might count "11, 10, 9, 8" instead of stopping at 9. Another common error is reversing the numbers accidentally, solving 8 - 5 when the problem asks for 5 - 8. You'll spot these mistakes by watching your child solve problems aloud or checking their written work against a number line. If answers seem off by one or two, ask them to explain their counting strategy step-by-step.