➕ 1st Grade Math · Unit 1

Addition and Subtraction Stories

15 short narrated lessons in 3 chapters, each with pictures, a quiz with a hint and a second try, and an explanation for every answer.

Standards: 1.OA.A.1 1.OA.B.3 1.OA.C.5 1.OA.C.6 1.OA.B.4

1st Grade Math · 7 units
  1. 1Addition and Subtraction Stories
  2. 2Working with Equations
  3. 3Numbers to 120
  4. 4Adding and Subtracting Tens
  5. 5Measurement and Time
  6. 6Data
  7. 7Shapes and Equal Shares
Picture from the lesson “More Join In!”
More Join In!
Picture from the lesson “Put Them Together!”
Put Them Together!
Picture from the lesson “Some Go Away!”
Some Go Away!

What your child will learn

Story problems

  1. More Join In!Solve story problems where more things join a group, using drawings and number sentences.
  2. Put Them Together!Solve story problems where two groups are put together to find the total.
  3. Some Go Away!Solve story problems where some things leave a group.
  4. Who Has More?Solve story problems that ask how many more or how many fewer.
  5. Story Problem Party! ReviewReview solving add, take away and compare story problems within 20.

Addition strategies

  1. Count On to Add!Add by starting at the bigger number and counting on.
  2. Turn-Around FactsSwitch the order of two addends and see the sum stays the same.
  3. Doubles Are Fast!Use doubles like 6 plus 6 to add quickly.
  4. Make a Ten to AddAdd numbers like 8 plus 5 by making a ten first.
  5. Addition Tricks Review ReviewReview counting on, turn-around facts, doubles and making ten.

Subtraction strategies

  1. Counting BackSubtract small numbers by counting back.
  2. Think Addition to SubtractSolve 10 minus 8 by thinking what to add to 8 to make 10.
  3. Using Ten to SubtractSubtract numbers like 13 minus 4 by breaking apart to get to ten.
  4. Fact FamiliesWrite the related addition and subtraction facts for three numbers.
  5. Subtraction Strategies Review ReviewReview counting back, thinking addition and fact families.

Try a question from this unit

From the lesson “More Join In!”

4 frogs in one box, a plus sign, and 3 more frogs in another box.

4 frogs sit on a log. 3 more frogs hop on. How many frogs are on the log in all?

  • [object Object]
  • [object Object]
  • [object Object]
Show the answer

[object Object]. 4 frogs and 3 more frogs make 7 frogs in all.

Hint kids see after a wrong try: “Count the first frogs, then keep counting the new ones.”

Key words

  • join
  • in all
  • total
  • left
  • how many more
  • count on
  • addend
  • sum
  • doubles
  • make ten
  • count back
  • unknown addend
  • ten
  • fact family
All 1st Grade Math units Working with Equations →

Try these lessons in Kids Shelf

Narrated lessons, pictures and quizzes for every grade from K to 8. Works offline.

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