About This Worksheet
Break Apart Subtraction is a second grade strategy activity that helps students subtract a two-digit number in two smaller steps. Children break the second number into tens and ones, subtract the tens first, and then subtract the ones. For example, the model shows 57 − 24 as 57 − 20 = 37 and then 37 − 4 = 33. This helps students see that subtraction can be handled in manageable parts instead of all at once. The method also strengthens mental math and place-value understanding.
Curriculum and Grade Alignment
This worksheet is made for second grade learners who are ready to use decomposition as a subtraction strategy. The main goal is to help students split the subtrahend into tens and ones and subtract each part in sequence. Before using this page, your child should be comfortable subtracting multiples of 10 and basic one-digit amounts. The next step is using the same strategy mentally without all of the written prompts. This activity supports decomposition, mental subtraction, and place-value fluency.
Student Tasks
Students will solve eight two-digit subtraction problems. For each one, they break apart the second number into a tens part and a ones part. They subtract the tens first, then the ones, and write the final answer. Problems include examples such as 68 − 25, 74 − 32, 83 − 41, and 56 − 23. The guided blanks help students show the strategy step by step.
Common Challenges and Misconceptions
Some students may split 25 into 2 and 5 instead of 20 and 5. Others may subtract the ones first even though the worksheet is designed around tens-first thinking. A child may also lose track of the intermediate result before the second subtraction step. Encourage your child to say, “Subtract the tens, then subtract the ones,” before starting. Writing the intermediate number clearly helps prevent mistakes.
Implementation Guidance
Teachers can use this worksheet after students understand two-digit numbers as tens and ones. It works well for transitioning from concrete place-value models to mental subtraction. Parents can ask the child to break the second number apart aloud before doing any calculation. If needed, draw a quick number bond showing the tens and ones. This makes the decomposition easier to see.
Details and Features
This worksheet includes a worked example and eight guided subtraction problems. Each problem provides spaces for the tens subtraction, ones subtraction, and final answer. The orange-bordered grid keeps the steps consistent and easy to follow. The printable supports decomposition, mental math, place value, and two-digit subtraction.