Addition and Subtraction

NZ Level 3

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

Lesson

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?

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

Find the value of $440+22+7$440+22+7.

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

Use a range of additive and simple multiplicative strategies with whole numbers, fractions, decimals, and percentages.

Record and interpret additive and simple multiplicative strategies, using words, diagrams, and symbols, with an understanding of equality