Add two 1-digit numbers, crossing ten
2 printable PDFs, each with its answer key. These sheets practice adding two 1-digit numbers whose sum is more than 10, like 8 + 5 or 7 + 6.
Sheet 1
Sheet 2
What's on the sheet
36 problems written across, with a box for each answer, on US Letter paper, with a box for the score. Some from sheet 1:
- 7 + 9 = 16
- 3 + 8 = 11
- 8 + 9 = 17
- 4 + 9 = 13
Helping at home
In 1st grade, children learn to add within 20, and the facts that cross ten are the hardest ones to remember. A strong strategy is to make a ten: for 8 + 5, take 2 from the 5 to fill 8 up to 10, and 10 + 3 = 13.
Many children count on one at a time, which works but is slow and easy to miss by one. Others mix up the teen numbers when they write them, writing 31 for 13.
One way to help at home: play "make ten." Ask, "How many more does 8 need to make 10?" Once that is quick, the rest follows. Doubles help too: if your child knows 6 + 6 = 12, then 7 + 6 is one more, 13. A few minutes a day matters more than one long session.
Practice the same skill as a game
In larkit, your child plays this skill on screen, with a second try and a hint when a problem is hard. Free to try, no ads.
Play it freeWant more sheets?
The free sheets above need no email. If you'd like extras, we can send them.
Common Core: 1.OA.C.6