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Lesson · Grade 3 · Mathematics

Make a Ten to Add

  • Grade 3
  • Mathematics
  • 51 s
  • British Columbia
  • BC3-MA-10

To work out 8 + 5, two pink counters move into the first ten frame, because 8 needs 2 more to make 10, and a number bond splits the 5 into 2 and 3. The three counters left over give 10 + 3 = 13, checked by counting on, and the video ends on "Make a 10, then add the rest".

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In one sentence

The question this lesson answers

What is eight plus five?

Here are eight blue and five pink counters.

Transcript

What the lesson says

What is eight plus five?

Here are eight blue and five pink counters.

Make a ten first, because ten is easy to add to.

Eight needs two more to make ten.

So split five into two and three.

Move two pink counters over to fill the frame.

Eight plus two makes ten.

Three pink counters are left.

Ten plus three is thirteen.

Count on to check: ten, eleven, twelve, thirteen.

So eight plus five is thirteen.

Make a ten, then add the rest.

Curriculum

Where this fits

British Columbia, Grade 3

Mathematics, Number: addition and subtraction facts to 20 (emerging computational fluency)BC3-MA-10

Previous: Friendly Numbers: Estimate First, Then AdjustNext: Doubles and Near Doubles: 6 + 7

The outcomes and strands follow the British Columbia curriculum.

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