Flashcards · 1st and 2nd grade

Addition flashcards to 20

The harder addition facts, sums from 11 to 20 such as 7 + 6 and 9 + 8, with the answers on the back. 55 cards, with each answer printed on the back.

Download the flashcards(10 pages, color)Ink saver (B&W)

Addition flashcards to 20: the answers for the back of page 1

Answers on the back

Print double-sided and choose flip on long edge. Each page of cards is followed by its answer page, laid out in mirror order so every answer sits right behind its card. Single-sided printer? Glue each answer page to the back of its card page before cutting.

All 55 facts

Sums 11 to 20

1 + 10 = 11
2 + 9 = 11
2 + 10 = 12
3 + 8 = 11
3 + 9 = 12
3 + 10 = 13
4 + 7 = 11
4 + 8 = 12
4 + 9 = 13
4 + 10 = 14
5 + 6 = 11
5 + 7 = 12
5 + 8 = 13
5 + 9 = 14
5 + 10 = 15
6 + 5 = 11
6 + 6 = 12
6 + 7 = 13
6 + 8 = 14
6 + 9 = 15
6 + 10 = 16
7 + 4 = 11
7 + 5 = 12
7 + 6 = 13
7 + 7 = 14
7 + 8 = 15
7 + 9 = 16
7 + 10 = 17
8 + 3 = 11
8 + 4 = 12
8 + 5 = 13
8 + 6 = 14
8 + 7 = 15
8 + 8 = 16
8 + 9 = 17
8 + 10 = 18
9 + 2 = 11
9 + 3 = 12
9 + 4 = 13
9 + 5 = 14
9 + 6 = 15
9 + 7 = 16
9 + 8 = 17
9 + 9 = 18
9 + 10 = 19
10 + 1 = 11
10 + 2 = 12
10 + 3 = 13
10 + 4 = 14
10 + 5 = 15
10 + 6 = 16
10 + 7 = 17
10 + 8 = 18
10 + 9 = 19
10 + 10 = 20

How to practice

Start with eight to ten cards, not the whole set.
Show a card. If the answer comes quickly, it goes on the “know it” pile; if not, say it together and put it on the “not yet” pile.
Next time, start with the “not yet” pile and add two new cards.
Five minutes a day is enough. Stop while it is still fun.

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What is in this PDF?

55 cards on 5 pages of fronts, each followed by its page of answers (10 pages in all). Print double-sided, flip on long edge, so every answer lands on the back of its card.

What grade are these flashcards for?

1st and 2nd grade. The harder addition facts, sums from 11 to 20 such as 7 + 6 and 9 + 8, with the answers on the back.

How do I make them last?

Print on card stock, or laminate the sheets before cutting. A hole punch and a binder ring keep a set together.

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