Hard-2 is the toughest sheet and focuses on word problems with unknowns in different positions. First graders use a work box to figure out how many cars Noah started with and how many fish swam away. Two more problems without a box ask how many buttons Mia still needs and how many books are left after some are taken. The Think About It part practices missing-addend equations and fact families.
Style:
Word Problems: Add & Subtract Within 20
Part A: Show Your Work
Read each problem carefully. Use the box to show your work.
1. Noah had some toy cars. He got 6 more and now has 14. How many toy cars did Noah start with?
Answer: 8 toy cars
2. There were 16 fish in a pond. Some fish swam away and now there are 9. How many fish swam away?
Answer: 7 fish
Part B: Solve Without a Work Box
Read each problem and write the answer on the line.
1. Mia has 11 buttons. She needs 20 buttons for her art project. How many more buttons does she need?
Answer: 9 buttons
2. A shelf has 8 big books and 7 small books. If 5 books are taken off, how many books are left?
Answer: 10 books
Part C: Think About It
Write the missing number on each line.
1. 7 + 8 = 15
2. 20 - 7 = 13
3. If 9 + 6 = 15, then 15 - 9 = 6.
4. Dan had 18 cards. He lost some and now has 11. He lost 7 cards.
Word Problems: Add & Subtract Within 20
★ Part A: Show Your Work
Read each problem carefully. Use the box to show your work.
1) Noah had some toy cars. He got 6 more and now has 14. How many toy cars did Noah start with?
Answer: 8 toy cars
2) There were 16 fish in a pond. Some fish swam away and now there are 9. How many fish swam away?
Answer: 7 fish
★ Part B: Solve Without a Work Box
Read each problem and write the answer on the line.
1) Mia has 11 buttons. She needs 20 buttons for her art project. How many more buttons does she need?
Answer: 9 buttons
2) A shelf has 8 big books and 7 small books. If 5 books are taken off, how many books are left?
Answer: 10 books
★ Part C: Think About It
Write the missing number on each line.
1) 7 + 8 = 15
2) 20 - 7 = 13
3) If 9 + 6 = 15, then 15 - 9 = 6.
4) Dan had 18 cards. He lost some and now has 11. He lost 7 cards.
Ready to Practice?
Read each word problem carefully. Some problems ask you to find a missing part. Show your work and write the answer.
8 Questions
15-20 minutes
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