Subtraction equations
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Subtraction equations: skill guide
| Objective | Each problem shows the starting amount as dots in a frame of ten cells. |
|---|---|
| Grade | Kindergarten |
| Standard | CCSS.MATH.CONTENT.K.OA.A.1 |
| Difficulty | Foundational · Mixed |
| Representation | Dot model, Numerical equation |
| Practice format | Interactive, account-free practice with immediate feedback |
Objective
Each problem shows the starting amount as dots in a frame of ten cells.
What this practice covers
Each problem shows the starting amount as dots in a frame of ten cells. On wide screens the frame is one row of ten. On smaller screens and on the printed worksheet it is two rows of five. The equation gives the starting number and the number to subtract. Learners tap that many dots to fade them, then choose the number of dots still showing to fill the final blank. The cells hold the dots in a fixed layout, so learners can find the difference without recounting a loose pile.
Standards alignment
Supports Common Core: CCSS.MATH.CONTENT.K.OA.A.1 — Represent subtraction with objects, drawings, expressions, or equations.
Who it’s for
This practice is for kindergarten learners who count reliably through ten and are beginning to understand subtraction as taking away. The interactive dots keep each equation connected to a visible action, so formal fact recall is not required.
What to know first
- Learners should count objects through ten, recognize numerals from 0 to 10, and understand that crossing out or fading an object means it is no longer part of the group being counted. Familiarity with the minus and equals signs is helpful but can develop during the practice.
Difficulty and scaffolding
Foundational · Mixed stage
Problem representations
- Dot model
- Numerical equation
Three worked examples
- The frame shows 9 dots. Fade 2, leaving 7: 9 − 2 = 7.
- The frame shows 6 dots. Fade 4, leaving 2: 6 − 4 = 2.
- A full frame shows 10 dots. Fade 5, leaving the other half: 10 − 5 = 5.
Likely misconceptions
- Learners may fade the number that should remain, count empty cells, or report how many were removed. Read the equation aloud as ‘start with, take away, leaves.’ Only the dots belong to the starting amount, so empty cells are never counted. A faded dot can be tapped again to bring it back before an answer is chosen.
Hints and explanations
- The frame shows 9 dots. Fade 2, leaving 7: 9 − 2 = 7.
- The frame shows 6 dots. Fade 4, leaving 2: 6 − 4 = 2.
- A full frame shows 10 dots. Fade 5, leaving the other half: 10 − 5 = 5.
What to practice next
Next, More subtraction equations works the same way, with starting amounts from 4 to 10. The equation gives the starting amount and the amount taken away, and learners find how many remain. Its dots always sit in two rows of five, at every screen size.
Editorial review
Reviewed by Brilliant’s curriculum team. Exercises are generated within defined difficulty ranges and checked against verified answer rules.
Subtraction equations FAQs
Why put the dots in a frame of ten cells?
The cells hold the dots in fixed places. When the frame shows two rows of five, a full row is five at a glance. Either layout makes it easier to see how many remain after dots are faded.
What does a faded dot represent?
A faded dot was part of the starting amount but has been taken away. It remains faintly visible so the learner can still see both the original whole and the removed part.
Should empty cells be counted?
No. Empty cells are available spaces, not part of the starting group. Count only the colored dots when reading the first number in the subtraction equation.
How should the equation be read?
Read it from left to right: the first number is the starting amount, the second number is taken away, and the number after the equals sign tells how many remain.