Addition & subtractionGrade 1
3-Number Operations practice
Three numbers in one line, worked left to right with plus and minus mixed, such as 2 + 9 + 2.
Example problems
1
＋
1
＋
4
＝
6
2
＋
9
＋
2
＝
1
3
6
＋
3
＋
4
＝
1
3
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.
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This skill does not unlock anything further.