WEBVTT
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Making Two-Digit Numbers with Tens and Ones
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In this video, we will learn how to use place value equipment to make two-digit numbers with tens and ones.
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The number 33 is a two-digit number.
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Two-digit numbers have a tens digit and a ones digit.
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The tens digit in the number 33 is worth three 10s.
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We can show this using three 10s blocks.
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10s blocks are made using 10 bricks.
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To show three 10s, we need three 10s blocks.
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The number 33 has three ones.
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We can show this using three ones bricks.
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Three 10s are 30.
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10, 20, 30.
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And our three ones blocks are worth three.
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So, we can model the number 33 using three 10s blocks, which are worth 30, and our three ones.
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30 and three makes 33.
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10, 20, 30, 31, 32, 33.
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Let’s practice using place value equipment to make two-digit numbers with tens and ones.
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What is the number?
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45, nine, or 54.
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To help us find the number, we need to count the number of 10s and ones it has.
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Let’s start by counting the number of 10s.
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One, two, three, four.
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So, we need to write the digit four in the tens place.
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Now, let’s count the ones.
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One, two, three, four, five.
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So, we need to write our five digit in the ones place.
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Which two-digit number have we made?
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45, nine, or 54?
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It’s number 45.
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Four 10s are worth 40.
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10, 20, 30, 40.
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And five ones are five.
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40 plus five makes 45.
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The number is number 45.
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Find the missing part.
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Is it five, 50, or eight?
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We’re shown a part–whole model.
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The number 85 is the whole number.
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It’s a two-digit number.
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It has a tens digit and a ones digit.
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This part of the number is the tens part.
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The number 85 has eight 10s.
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We can model eight 10s using eight 10s blocks.
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Let’s count in 10s.
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10, 20, 30, 40, 50, 60, 70, 80.
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The eight digit in the number 85 is worth 80.
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And the five digit in the number 85 is worth five ones.
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80 plus five is 85.
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The missing part of the number is five.
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85 has eight 10s, which are worth 80, and five ones.
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Find the missing part.
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72 what two.
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Is it 70, seven, or 700?
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We’re shown a part–whole model.
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The whole part is the number 72, which is a two-digit number.
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It has a tens part and a ones part.
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The missing part is the tens part.
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So we need to work out how many 10s there are in the number 72.
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We already know that 72 has two ones.
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Is the missing part 70, seven, or 700?
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We already know the two digit is worth two ones.
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And we also know that the number 72 has a seven digit, which is its tens digit.
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We might think that the missing number is seven, but it’s not.
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We have to think about what seven 10s are worth.
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Here are seven 10s.
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Let’s count in 10s to find out what they’re worth.
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10, 20, 30, 40, 50, 60, 70.
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The missing part of the number is 70.
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72 is made up of seven 10s, which are worth 70, and two ones.
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What have we learned in this video?
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We’ve learned how to use place value equipment to make two-digit numbers with tens and ones.