2. Addition and subtraction

Let's find the value of $705+205$705+205, by partitioning the numbers.

a

Fill in the box with the missing number.

$705=700+\editable{}$705=700+

b

Fill in the box with the missing number.

$205=\editable{}+5$205=+5

c

Find the value of $705+205$705+205.

Easy

< 1min

Let’s find the value of $206+304$206+304, by partitioning the numbers.

Easy

< 1min

Let’s find the value of $8005+1005$8005+1005, by partitioning the numbers.

Easy

3min

Let’s find the value of $5004+3006$5004+3006, by partitioning the numbers.

Easy

< 1min

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uses mental and written strategies for addition and subtraction involving two-, three-, four and five-digit numbers