Standard 3 · SEA Mathematics

Adding and Subtracting

Add and take away in columns up to 4 digits, with carrying, regrouping, estimating and checking. Each exercise marks itself as your child goes, explains the answer, and awards stars.

Practise this topic free All Standard 3 Maths topics

What your child practises

Skills in this topic

Adding three-digit numbersAdding four-digit numbersAdding up to four numbersSubtracting three-digit numbersSubtracting four-digit numbersEstimating sums and differencesChecking with the opposite operationSteps of the column methodNumber stories

Free to try

8 free exercises in this topic

Carry and regroup

Sort the sums

Add up to four numbers

Missing digits

Steps and checks

Estimate, then calculate

Is the answer sensible?

Choose the correct two

Plus adds 6 more exercises on this topic.

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Inside the app

How an exercise works

SEA practice app: Exercises inside a topic — Exercises inside a topic

SEA practice app: Instant feedback on every answer — Instant feedback on every answer

SEA practice app: Stars, ranks and badges — Stars, ranks and badges

Plus

Every topic has free exercises to start. Plus unlocks the full set and every mock paper for TT$150 per child per month (US$25), on up to 3 devices.

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More Standard 3 Maths topics

Compare, Order and Round

Compare numbers up to 9 999 with the greater than and less than symbols, put them in order, and round to the nearest ten, hundred and thousand.

9 free exercises

Fractions

Halves, quarters, eighths and more: name them, compare them and use them.

6 free exercises

Money and Word Problems

Totals, change, sharing, best buys and profit, in TT dollars and cents.

6 free exercises

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