Students compute the total of an array with rows of 2 by adding 2 repeatedly (e.g., 2 + 2 + 2 for 3 rows of 2).
Real questions from this skill, graded here. No account, and nothing is saved.
Grade 2 · Rectangular Arrays and Repeated Addition · question 1 of 3
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12 rungs. A star at the top.
3 ducks have 2 legs each. How many legs are there?
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Repeated addition of 2s means adding 2 again and again.
The total grows by 2 each time.
3 trays sit in a row, 3 apples on each. You could count every apple from 1 — or skip-count the trays: 3, 6, 9.
Counting every apple from 1 works, but it is slow, and a skipped apple throws the whole count off.
Each tray holds the same 3 apples, so you only need that 3 again, not a new count.
3, 6, 9 are running totals — the last one is how many apples you have.
When every tray is the same, skip-count the trays, not the apples.
Adding the first 2 trays: 3, 6, and answering 6, forgetting the last tray.
There are 3 trays. Keep skip-counting until the last tray: 3, 6, 9.
5 trays, with 2 apples on each. Add the 2s: how many apples? — 10. 5 trays with 2 apples in each: skip-count the trays — 2, 4, 6, 8, 10.
Let's count cookies on a tray! Each row has two cookies, and we have four rows.
Row one has two cookies. That's two.
Row two has two more. Two plus two is four.
Row three has two more. Four plus two is six.
Row four has two more. Six plus two is eight.
We can write this as repeated addition: two plus two plus two plus two.
Adding them all up gives us eight.
Four rows of two equals eight. Repeated addition helps us count arrays fast!
While they climb, your page writes one true line to ask about tonight, and a short note each Sunday.
A chessboard has 64 squares — share them out between the 8 rows and each row holds exactly 8.
An example student.
Maya earned 2 stars this week — Interpret multiplication as equal groups, which took 6 answers over 3 days before its star landed 3 days ago and Multiply by 6, 7, 8 and 9. Next up: Divide within 100.
An example week.
14 days of every skill, practice packets, Fluency sheets and up to four students. No card.