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Lesson · Grade 1 · Mathematics

Make a 10 First: 8 + 5

  • Grade 1
  • Mathematics
  • 1 min 3 s
  • British Columbia
  • BC1-MA-07

Eight red and five yellow counters are counted into two ten frames, then two yellow counters move across to fill the first frame's two empty boxes and make one full ten. Three counters are left, so 10 + 3 = 13, checked by counting on from ten, and the video ends with 8 + 5 = 13 and the tip to make a ten first.

Concept: Adding by making a 10 first

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In one sentence

The question this lesson answers

What is eight plus five? Let's use two ten frames.

Put eight red counters in the first frame.

Transcript

What the lesson says

What is eight plus five? Let's use two ten frames.

Put eight red counters in the first frame.

One, two, three, four, five, six, seven, eight.

Put five yellow counters in the next frame.

One, two, three, four, five.

The first frame has two empty boxes.

Move two yellow counters across to fill them.

Eight, nine, ten.

The frame is full. That is one full ten.

One, two, three. Three yellow counters are left.

Ten plus three is thirteen.

Count on to check. Ten, eleven, twelve, thirteen.

Make a ten first. Eight plus five is thirteen.

Curriculum

Where this fits

British Columbia, Grade 1

Mathematics, Number: addition and subtraction to 20 (understanding of operation and process)BC1-MA-07

Previous: Adding Joins Groups, Subtracting Takes Some AwayNext: Doubles: Adding a Number to Itself

The outcomes and strands follow the British Columbia curriculum.

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