Question Video: Writing Three-Digit Numbers in Digit Form given a Place Value Table Mathematics • 2nd Grade

Olivia uses place value blocks to show a number. What is the number? What is 100 less than this number?

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Video Transcript

Olivia uses place value blocks to show a number. What is the number? What is 100 less than this number?

Olivia has modeled a three-digit number using place value blocks. The first thing we have to do is work out what the number is. Three-digit numbers have a hundreds digit, a tens digit, and a ones digit. Let’s start by counting the number of 100s in this number. How many 100s blocks can you count in the hundreds place? There are three. Let’s count the number of 10s blocks now. There’re five. How many ones can you count? One, two, three, four, five, six, seven. Olivia’s number has three 100s, five 10s, and seven ones. Olivia has modeled the number 357.

In the second part of the question, we have to find the number that is 100 less than this number. To find 100 less than 357, we need to take away one of the 100s blocks. We have three 100s, and if we take away 100, we’ll have two 100s left. We still have five 10s, and we still have seven ones. Two 100s, five 10s, and seven ones is 257. To find 100 less than 357, we took away one of the 100s blocks. 100 less than 357 is 257.

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