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Adding and subtracting to 1000

Mathematics

Adding and subtracting to 1000

An AR classroom game for Grade 3. Learners can aim with their hands at the camera or play by tapping the screen.

This set has 6 questions in an interactive multiple choice activity.

Curriculum indicatorค 1.1 ป.3/5

PlayHost a classroom

A look before you play

Sample questions

A few real prompts from the game to help you choose an activity for your class.

  1. 234 + 152 = ?

    • 386
    • 396
    • 376
    Read the explanation

    Add column by column from the right: four plus two is six, three plus five is eight, two plus one is three.

  2. 465 + 128 = ?

    • 583
    • 593
    • 693
    Read the explanation

    Five plus eight is thirteen, carry one; six plus two plus one is nine; four plus one is five.

  3. 700 - 250 = ?

    • 550
    • 350
    • 450
    Read the explanation

    Seven hundred take away two hundred and fifty leaves four hundred and fifty.

Before you play

Game teaching guide

What children will practise

Add and subtract three-digit numbers with and without carrying, and add up to 1,000, as part of solving addition and subtraction number sentences (indicator ค 1.1 ป.3/5).

What's in the worksheet

6 multiple-choice questions - 234 + 152 = 386 with no carrying - 465 + 128 = ? with a carry in the ones, answer 593 - 700 - 250 = 450 - 836 - 421 = 415 - 999 + 1 = ? answer 1000, distractors 9991 and 1010

How to use it in class

Use at the start of the three-digit addition and subtraction unit, 6-8 minutes, solo mode to check the basics. - For 700 - 250, try counting on from 250 to 300 and then to 700; easier than borrowing across zeros - For 999 + 1, use hundreds flats and tens rods to show the carry rippling through three columns - Play it linked to the class to record results in the mark book, then group pupils who missed 465 + 128 for more carrying practice

Common sticking points

- Choosing 583 for 465 + 128 by forgetting the carry, or 693 by carrying into the wrong column - Choosing 550 for 700 - 250 by doing 5 - 0 in the tens. Count on instead - Choosing 9991 for 999 + 1 by writing the 1 on the end, or 1010 by not carrying through every column

Play together first, then build on it with a worksheet for the same level.

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Adding and subtracting to 1000 — AR game for Grade 3 | Krufahda