Addition
Learn to add numbers from sums to 10 through sums to 20
10 lessons with worksheetsStart Learning
Build strong foundations with addition, subtraction, counting, place value, and number comparison
A spiral-review worksheet mixing problems from every 1st Grade topic — free to print, with answer key.
Learn to add numbers from sums to 10 through sums to 20
Master part-part-whole within 20 and fact families
Count to 120 and learn skip counting by 2s, 5s, and 10s
Learn make 10 strategy, doubles, and doubles plus one