GRADE 1 · ALBERTAOUTCOME AB-G1-1N2
L1 · Adding: joining and growing within 20
Learning goal
“I can put two groups together and find how many in all.”
Add — to put groups together.
Sum — how many in all after adding.
In all — the whole amount after joining.
Plus sign (+) — the sign that means add.
Worked example
6 red counters and 5 blue counters sit on a mat. Put the groups together. Count in all: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11. 6 + 5 = 11. The sum is 11. Say it plainly: adding joins two groups into one bigger group.
Check yourself — explain it
We add here because...
Paired problem — example still visible
7 stars and 4 stars. Count in all. -> 7 + 4 = 11
Faded completion — last step is yours
"8 + 3: count in all - 8, 9, 10, ___" -> 11
Ready to practise?
8 scored questions with a 3-rung hint ladder. Mastery needs 7/8 plus both gate questions.