1. Tommy has 15 red marbles and 3 blue marbles. To find the total, add the two amounts: 15 + 3 = 18. He has 18 marbles in total.
2. Lisa starts with 9 stickers and receives 4 more. Add the new stickers to her original amount: 9 + 4 = 13. Lisa now has 13 stickers.
3. There are 12 apples on the tree, and 5 fall off. Subtract the fallen apples from the original number: 12 - 5 = 7. There are 7 apples left on the tree.
4. Sita had 8 crayons and gave away 3. Subtract the given crayons from her original amount: 8 - 3 = 5. Sita now has 5 crayons.
Parent Tip: Review the logic above to help your child master the concept of word problems worksheet 1st grade.