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This Adding Multiples Of 10 drill has 40 problems for Grade 2. Daisies theme. Answer key included.
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Max discovered butterflies trapped in daisy petals! He must add groups of ten flowers to set them free before sunset.
Standard: CCSS.MATH.2.NBT.B.5
Adding multiples of 10 is a cornerstone skill that helps second graders recognize patterns in our number system and build mental math fluency. When children can quickly add 10, 20, 30, or 40 to any number, they're developing number sense that makes larger addition problems feel manageable. This skill bridges the gap between single-digit facts and two-digit computation, which is essential for Grade 2 standards. At ages 7-8, students are developing the cognitive ability to see that 23 + 10 is really just 2 tens and 3 ones becoming 3 tens and 3 ones—a conceptual leap that prepares them for regrouping in later grades. Mastery here also builds confidence and reduces math anxiety, as children realize they can solve problems independently using patterns rather than counting on their fingers. Beyond the classroom, this skill appears whenever children encounter groups of 10—money, blocks, or even arranging a garden of daisies in neat rows.
The most common error at this level is when students recount from 1 instead of using the tens pattern. For example, when solving 14 + 20, a child might count "15, 16, 17..." rather than recognizing that adding 20 means adding two tens, resulting in 34. Teachers and parents can spot this by watching how long the child takes—if it takes 20+ seconds, they're likely counting rather than jumping by tens. Another frequent mistake is misaligning numbers on paper, writing 14 + 20 as if the zero doesn't matter, leading to answers like 15 instead of 34.
At home, use a 100-chart or number line taped to your kitchen cabinet and practice "jumping by 10s" together. Call out a number like 17, and have your child place their finger there, then jump up 10 spaces and say the new number aloud. Do this for 2–3 minutes while waiting for dinner or during a car ride. This physical movement helps anchor the pattern in their memory and makes adding 10, 20, or 30 feel automatic rather than difficult. Repeat the same starting numbers across several days so they build true fluency.