Addition & subtractionGrade 2
Addition Past 100 practice
Add two 2-digit numbers whose sum reaches 100 or more, so the column carries into the hundreds, such as 89 + 83 = 172.
Example problems
2
2
7
8
＋
0
1
0
1
1
8
9
8
3
＋
2
1
7
1
1
4
2
6
9
＋
1
1
1
1
1
How a practice round works
A round has 10 problems from this skill. Type the digits into the dotted boxes; if a digit is wrong, you simply try again. Get 5 of your last 6 problems right on the first try to master the skill, then keep practicing to earn up to three stars.