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Hong Kong
Stage 1

Add 3 numbers (mix of single, two and three digit numbers)


You may have seen a bit of addition with 3 digit numbers already, or tried adding 3 numbers at once.  Now you'll combine the two strategies to add 3 numbers that include larger 3 digit numbers.

You may wish to review strategies of adding across the 100 if you haven't done so already.  Then, watch the video to see how to add a three digit, two digit, and single digit number all at once.  Do you think these tricks make adding much easier?

Worked Examples

question 1

Evaluate $600+90+7$600+90+7

question 2

Find the value of $440+22+7$440+22+7.

question 3

Evaluate $556+21+1$556+21+1.

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