Students will demonstrate automatic recall of all sums of two one-digit numbers and related subtraction facts within 20, without relying on strategies or counting. Fluency is measured by accuracy and speed.
Real questions from this skill, graded here. No account, and nothing is saved.
Know Addition and Subtraction Facts from Memory within 20
Grade 2 · Addition and Subtraction Fluency within 20 · question 1 of 3
0 of 12
12 rungs. A star at the top.
6 + = 7
0:00 of 3:18
A fact is a sum you know by heart.
Related facts live in a family.
8 + 5: 8 needs 2 more to make 10. Take 2 from the 5, and 3 are left: 10 + 3 = 13.
10 is easy to add to: 10 and 3 is 13 without counting.
The 5 splits into 2 and 3, so no counters are lost or added.
So 8 + 5 is the same as 10 + 3, and both are 13.
Make 10 first, then add what is left.
Counting on 5 from 8 and losing count: 9, 10, 11, 12.
Make 10 with 2 of the 5. 3 are left: 13.
6 + 5 = ___ — 11. 6 and 4 make 10, and 1 more is 11.
Quick — how fast can you answer eight plus seven?
Let's solve it using a strategy called make-a-ten.
Break the seven into two and five.
Slide the two over to eight. Eight plus two makes ten.
Now add the leftover five. Ten plus five is fifteen.
So eight plus seven equals fifteen.
Here's the cool part — one fact gives you a whole family of four.
Practice these until they pop into your head instantly. That's fluency!
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.