KnowledgeMadeFun, home

Lesson · Grade 1 · Mathematics

Doubles: Adding a Number to Itself

  • Grade 1
  • Mathematics
  • 1 min 23 s
  • British Columbia
  • BC1-MA-08

Two hands held up show 5 and 5, the same number twice, and counting on over the second hand checks that 5 + 5 = 10; then a domino with 6 dots on each side is counted one dot at a time and counted on from 6 to 12, so double 6 is 12. One more dot turns it into 6 + 7, a near double: double 6 and 1 more, so 12 + 1 = 13.

Anyone can watch two lessons on the website without an account. Signing in is free, no payment and no card, and opens three a day; Plus has no limit.

Loading

Share to Google Classroom

In one sentence

The question this lesson answers

What is a double? Hold up two hands to find out!

Look, each hand has 5 fingers.

Transcript

What the lesson says

What is a double? Hold up two hands to find out!

Look, each hand has 5 fingers.

5 plus 5 adds the same number twice. That is a double!

Count on from 5: 6, 7, 8, 9, 10. So 5 plus 5 is 10!

Now look at this domino. It has two sides.

Count the dots on this side: 1, 2, 3, 4, 5, 6.

Now count the other side: 1, 2, 3, 4, 5, 6.

6 plus 6 adds the same number twice. Another double!

Count on from 6: 7, 8, 9, 10, 11, 12.

So 6 plus 6 is 12. Double 6 is 12!

Add 1 more dot. Now it is 6 plus 7.

6 plus 7 is double 6, and 1 more.

Double 6 is 12. 1 more makes 13. So 6 plus 7 is 13!

A double adds a number to itself!

Curriculum

Where this fits

British Columbia, Grade 1

Mathematics, Number: addition and subtraction to 20 (understanding of operation and process)BC1-MA-08

Previous: Make a 10 First: 8 + 5Next: Adding and subtracting are related

The outcomes and strands follow the British Columbia curriculum.

Keep going

More on this topic