NZ Level 3
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Add and subtract three digit numbers II

Interactive practice questions

Evaluate $605+305$605+305 by doing the following.

a

Fill in the box with the missing number.

$605=600+\editable{}$605=600+

b

Fill in the box with the missing number.

$305=\editable{}+5$305=+5

c

Using the answers from the previous parts, solve $605+305$605+305.

Easy
Less than a minute
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Evaluate $306+604$306+604 by doing the following.

Using the fact that $201=200+1$201=200+1 and $309=300+9$309=300+9, evaluate $201+309$201+309.

Using the fact that $250=200+50$250=200+50 and $350=300+50$350=300+50, evaluate $250+350$250+350.

Outcomes

NA3-1

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

NA3-6

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

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