Kindergarten math · Unit 5: Adding and subtracting within 10

Three numbers, four facts

What this lesson shows

3, 5, and 8: 5 and 3 make 8, 3 and 5 make 8, 8 take away 5 is 3, and 8 take away 3 is 5.

The worked example

The lesson works this one step by step: 5 + 3. Then your kid tries one like it on paper.

The steps

  1. Two numbers and their total
  2. Two adding facts
  3. Two take-away facts
  4. All four go together

Helping at home

Read each box aloud. After each one, ask "what other facts use the same three numbers?" 5 and 3 make 8, so 8 take away 3 is 5.

If your kid gets stuck

Which three numbers go together?

Watch it with Lux

With Lux, this lesson is a narrated video and a printed page your kid works on. Then Lux helps with the same math on their own worksheet, one question at a time.

See how Lux works

Standards

  • Common Core K.OA.A.2
    Solve addition and subtraction word problems, and add and subtract within 10, e.g., by using objects or drawings to represent the problem.
Matches standards in 50 statesSee each state's code

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