How Many in the Array?

2.OA.4 — Use addition to find the total number of objects in rectangular arrays with up to 5 rows and 5 columns; write an equation as a sum of equal addends

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What is on the three How Many in the Array? worksheets

Support: sets the work out on an array of dots, a step at a time.
On level: The grade's own level, with an array of dots.
Challenge: moves the missing number out of the answer slot.

Example problems from the on-level sheet

4 groups of 2 — how many in all?
3 groups of 5 — how many in all?
4 groups of 5 — how many in all?

Every sheet is generated, so the numbers are different each time you make one.

Before this: 2.OA.3 — determine whether a group of up to 20 objects is odd or even; write an equation expressing an even number as a sum of two equal addends.