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Practice addition and subtraction that cross ten. Use visual ten-frames and method hints, then try a challenge without step-by-step help.
Learning task
First make 8 into 10, then add what remains.
Start with the original numbers
8
5
After bridging through 10
10
3
Overview
Understand what the tool solves, how it works, and the boundaries of its data.
This guided arithmetic practice focuses on two strategies: making a ten to add, and breaking a subtraction into parts to reach ten first. A ten-frame provides a visual model alongside the equation, so learners can connect the quantities they see with the steps in the calculation.
The addition set starts with a number from 6 through 9 and generates a problem that requires carrying into the next ten. The subtraction set uses a starting number from 11 through 18 and generates a problem that requires borrowing across the ten. It is a focused practice set, not every possible addition or subtraction fact with an answer under 20.
For example, to solve 8 + 5, take 2 from 5 to complete 10, then add the remaining 3: 8 + 5 = 8 + 2 + 3 = 13. For 13 − 5, subtract 3 to reach 10, then subtract the remaining 2: 13 − 5 = 13 − 3 − 2 = 8. Both examples can be checked directly by addition or subtraction.
Grade 1 standards in the United States include addition and subtraction work within 20. The reference below gives curriculum context; the tool’s own question ranges are determined by its practice design.
National Governors Association Center for Best Practices and Council of Chief State School Officers, Common Core State Standards for Mathematics, Grade 1 — supports the general grade-level context for arithmetic within 20; checked September 29, 2026.
Guide
Follow the workflow and verify inputs and outputs with practical examples.
Choose a learning, guided-practice, or challenge mode, then select addition or subtraction.
Read the equation and inspect the ten-frame. Before revealing a hint, say how many counters are needed to reach 10, or how many must be subtracted to get to 10.
Select an answer and check it. In learning and practice modes, use the step prompts to compare your reasoning with the displayed decomposition.
After a correct answer, continue to the next problem. Reset returns the current operation to its example problem.
In challenge mode, solve without step-by-step hints. The score and progress indicate activity in this round; they are not a formal test result. A useful self-check is to confirm that the parts you split add back to the original number being added or subtracted.
Use cases
See how the tool fits into real work and everyday tasks.
Ask the learner to predict the answer and explain the make-a-ten step before checking. If the answer differs, return to the frame and count the part that completes ten.
Display one problem and invite students to describe the missing counters or the amount to subtract before showing the hint. Compare the decomposition with the equation.
Start with visible guidance, then try challenge mode once the learner can explain why the number is split. Review the method as well as the selected answer.
Q&A
Find concise answers to common questions and confusing cases.
No. It focuses on generated addition problems that require carrying and subtraction problems that require borrowing, within the ranges described above.
Challenge mode is for solving without step prompts. Use a learning or practice mode first if the learner needs to see the decomposition.
No. The score reflects answers in the current round only. Ask the learner to explain the make-a-ten or break-ten steps to check understanding.
Notes
Review scope, result limitations, and important precautions before use.
This activity gives a limited set of generated arithmetic questions and visual hints. It does not provide a formal assessment, individualized lesson plan, or diagnosis of learning needs. Match practice to the learner’s current instruction, and use a teacher’s judgment for progress decisions.
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