Let’s find the value of $309+501$309+501, by partitioning the numbers.

a

Fill in the box with the missing number.

$309=300+\editable{}$309=300+

b

Fill in the box with the missing number.

$501=\editable{}+1$501=+1

c

Find the value of $309+501$309+501.

Easy

Approx a minute

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selects and applies appropriate strategies for addition and subtraction with counting numbers of any size