KnowledgeMadeFun, home

Lesson · Grade 2 · Mathematics

Tens and Ones: What Each Digit in 49 Is Worth

  • Grade 2
  • Mathematics
  • 57 s
  • British Columbia
  • BC2-MA-03

Ten cubes snap into a tower to make one ten, four towers are counted by tens to 40, and nine loose cubes are counted one at a time as nine ones. Arrows link the 4 in 49 to the towers and the 9 to the loose cubes, the video checks that 40 + 9 = 49, and it ends on the recap "In 49, the 4 is worth 40".

Concept: Tens and ones: what each digit is worth

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 each digit in forty-nine worth?

Ten cubes snap together to make one ten.

Transcript

What the lesson says

What is each digit in forty-nine worth?

Ten cubes snap together to make one ten.

Count the tens: ten, twenty, thirty, forty.

Four tens make forty in all.

The loose cubes are the ones. Let's count them one by one.

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

Four tens and nine ones make forty-nine.

The four in forty-nine shows four tens.

So the four is worth forty.

The nine in forty-nine shows nine ones.

So the nine is worth nine.

Check: forty and nine make forty-nine.

So in forty-nine, the four is worth forty.

Curriculum

Where this fits

British Columbia, Grade 2

Mathematics, Number: number concepts to 100BC2-MA-03

Previous: Comparing and Ordering Numbers to 100Next: Even and Odd Numbers: Can Every Sock Find a Partner?

The outcomes and strands follow the British Columbia curriculum.

Keep going

More on this topic