Free printable math drill — download and print instantly
This Adding Multiples Of 10 drill has 40 problems for Grade 1. Race Cars theme. Answer key included.
⬇ Download Free Math DrillGet new free worksheets every week.
All worksheets checked by our AI verification system. No wrong answers — guaranteed.
Max's race car needs fuel fast! Add by tens to fill his tank before the big championship race starts!
Standard: CCSS.MATH.1.NBT.C.4
Adding multiples of 10 is a cornerstone skill that helps first graders recognize patterns in our number system and build mental math fluency. When children can quickly add 20 + 30 or 40 + 10, they're learning that tens work just like single units—a crucial bridge toward understanding place value. This skill makes everyday math feel manageable: counting money, reading page numbers, or tracking scores in a game moves faster when a child doesn't have to count by ones every single time. At age 6 and 7, brains are wired to spot patterns, and multiples of 10 are the clearest pattern in our number system. Mastering this builds confidence and reduces the cognitive load, freeing mental energy for harder addition problems later. Students who see 30 + 20 as "three tens plus two tens equals five tens" are laying solid ground for all future math success.
Many first graders add the tens digits correctly but then forget to write the zero at the end—answering 2 + 3 = 5 instead of 20 + 30 = 50. Another frequent error is reversing the place value: a child might say 30 + 40 = 70 by miscounting the tens column. You'll spot this mistake when a student hesitates before writing the answer or counts on fingers instead of recognizing the pattern. Encourage them to say "three tens plus four tens" aloud before writing, which anchors the correct answer.
Create a simple tens-race using two piles of coins or blocks. Have your child pick one pile worth tens (say, 20¢ or two sticks of ten blocks) and another pile also in tens (say, 30¢ or three sticks). Ask them to say the total aloud as tens first—"two tens and three tens make five tens"—before counting the actual objects. This bridges the abstract symbol to concrete tens, making the pattern stick without feeling like a worksheet drill.