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This Multiplying By 10 100 drill has 40 problems for Grade 2. Dinosaurs theme. Answer key included.
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Max discovered ten dinosaur eggs hidden in volcanic caves. He must multiply fast to save them before lava arrives!
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Page 1 — Drill
Page 2 — Answer Key
What's Included
About this Grade 2 Multiplying By 10 100 Drill
Multiplying by 10 and 100 is a cornerstone concept that helps second graders develop number sense and mental math fluency. At this age, children are moving from counting-based strategies to understanding place value and patterns, which directly supports their ability to work with larger numbers confidently. When students grasp that multiplying by 10 means "adding a zero" or making a number 10 times bigger, they begin to see mathematics as a logical system rather than isolated facts to memorize. This skill accelerates their progress in multi-digit multiplication later on and builds the foundation for understanding decimals and division. Real-world applications are everywhere: counting dimes (10 cents each), thinking about 100 pennies in a dollar, or imagining a group of 10 dinosaurs compared to just one. Mastering this pattern also boosts confidence, as students realize they can solve problems involving larger numbers without relying solely on fingers or counting.
What your student will practice
- Multiply single-digit numbers by 10 with automaticity
- Multiply single-digit numbers by 100 using place value patterns
- Recognize and apply the pattern of adding zeros when multiplying by 10 and 100
- Solve word problems involving groups of 10 and 100
Common mistakes to watch for
The most common error is students writing down extra zeros mechanically without understanding why. For example, a child might write 3 × 10 = 300 instead of 30, simply because they've heard "add a zero" without grasping that multiplying by 10 makes something 10 times larger. Another frequent mistake is confusing 10 and 100—writing 4 × 100 = 40 because they only added one zero. Parents and teachers can spot this by asking the child to draw 3 groups of 10 dots or use base-ten blocks; if the student cannot match their written answer to a visual model, the concept hasn't solidified yet.
Create a "store" at home using coins, snacks, or toys priced at 10 cents or 10 pennies each. Have your child calculate the total cost for buying multiple items—for instance, "If each pencil costs 10 pennies and you want 4 pencils, how many pennies do you need?" This makes the multiplication concrete and shows why 4 × 10 = 40 in a tangible way. Repeat with groups of 100 using a dollar bill, asking how many dimes make a dollar or how many pennies equal 5 dollars. This real transaction-based practice anchors the pattern far better than worksheet repetition alone.