Add 3 dice
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Add 3 dice: skill guide
| Objective | Learners will be able to add the numbers on three dice and find a total from 3 to 18. |
|---|---|
| Grade | Grade 1 |
| Standard | CCSS.MATH.CONTENT.1.OA.A.2 |
| Difficulty | Developing · Mixed |
| Representation | Dice, Numerical equation |
| Practice format | Interactive, account-free practice with immediate feedback |
Objective
Learners will be able to add the numbers on three dice and find a total from 3 to 18.
What this practice covers
Each problem shows three dice and an addition equation with a blank for the total. The learner reads the number on each die, adds the three numbers, and taps the total from five choices. Each die shows 1 to 6, so totals range from 3 to 18. The dice appear on every problem.
Standards alignment
Supports Common Core: CCSS.MATH.CONTENT.1.OA.A.2 — Solve addition problems that call for the sum of three whole numbers whose sum is less than or equal to 20.
Who it’s for
This practice is for Grade 1 learners who can add two small numbers and are ready to add three. It also suits older learners who still count every dot one by one when adding.
What to know first
- Learners should count reliably, read two-digit numerals, and understand addition as joining parts. Each problem shows the three numbers as dice.
Difficulty and scaffolding
Developing · Mixed stage
Problem representations
- Dice
- Numerical equation
Three worked examples
- The dice show 2, 4, and 5. Add 2 + 4 to get 6, then add 5 more to get 11. So 2 + 4 + 5 = 11.
- The dice show 6, 6, and 3. The double 6 + 6 makes 12, and 3 more makes 15. So 6 + 6 + 3 = 15.
- The dice show 3, 6, and 4. 6 and 4 make 10, and 3 more makes 13. So 3 + 6 + 4 = 13.
Likely misconceptions
- Learners may count every dot from one across all three dice, or add two dice and forget the third. Have them say the number on each die, add two of them, then add the last one and check that all three dice are in the total.
Hints and explanations
- The dice show 2, 4, and 5. Add 2 + 4 to get 6, then add 5 more to get 11. So 2 + 4 + 5 = 11.
- The dice show 6, 6, and 3. The double 6 + 6 makes 12, and 3 more makes 15. So 6 + 6 + 3 = 15.
- The dice show 3, 6, and 4. 6 and 4 make 10, and 3 more makes 13. So 3 + 6 + 4 = 13.
What to practice next
Next, Add 3 numbers asks for three-number sums written as numerals only, with no dice. Each number is from 1 to 7, and totals go up to 20.
Editorial review
Reviewed by Brilliant’s curriculum team. Exercises are generated within defined difficulty ranges and checked against verified answer rules.
Add 3 dice FAQs
What is the goal of add 3 dice?
The goal is to add three numbers accurately. A learner should be able to say the number on each die, add two of them, and then add the third without recounting every dot.
Should this practice be timed?
No timer is required. First build accurate, understandable strategies. Speed usually improves as learners recognize dice patterns, doubles, and pairs that make 10.
What should a learner do after a mistake?
After a wrong answer, the learner gets a second try. Look at the dice again, say each number aloud, and add them in a different order to check. A short explanation helps more than a quick second guess.
How many problems should be completed at once?
A Quick check has 5 problems and a Practice session has 15. A learner may pause when attention drops. A short, successful session with clear reasoning is more useful than rushing through a longer one.