Students will use counting on (starting from one addend and counting up) and counting back (starting from the minuend and counting down) as strategies for addition and subtraction within 20. Students relate these counting strategies to addition and subtraction equations.
Real questions from this skill, graded here. No account, and nothing is saved.
Count On and Count Back to Add and Subtract
Grade 1 · Counting, Fluency, and Fact Strategies · question 1 of 3
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12 rungs. A star at the top.
Lena took 2 balls from a bag. 4 are left. How many at first?
0:00 of 2:57
Count on to add. Count back to subtract.
Do not count the start as a step.
7 + 3: start at 7 and count on 3: 8, 9, 10. 10 − 3: start at 10 and count back 3: 9, 8, 7.
Starting at 7 saves you counting all the way up from 1 again.
Each hop is 1 more, so 3 hops from 7 land on 10.
To take away, start at the big number and count back instead.
Start at the big number. Count on to add, count back to take away.
Saying 7 as the first count, and landing on 9.
7 is where you start. The first hop says 8: 8, 9, 10.
3 + 2 = ___ — 5. Start at 3. Count on 2: 4, 5.
You have seven stickers. Your friend gives you three more. How many do you have in all?
We can write that as seven plus three. Let's count on to find the answer.
Start at seven on the number line. Keep seven in your head.
Count on one more — eight.
Count on two more — nine.
Count on three more — ten!
Seven plus three is ten. Counting on is a fast way to add — and counting back works the same way for subtraction.
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.