Elementary Test Prep: Math 4 Test (Grades 3-4)Use Manipulatives with Place Value

Lesson Page Numbers & Numeration

You can show numbers using base-ten blocks to model a number.

	This is the 1-block or unit block the smallest of all the blocks.
	This is the 10-block corresponding to 10 units. It is also referred to as a rod or long.
	This is the 100-block and corresponds to 100 units. It is also called a flat.

Here are some numbers represented using base ten blocks.

Numbers are made up of digits in the same way that words are made up of letters.

Standard form	325
Written form	three hundred twenty-five

Use the model to help write the number

3 hundreds	2 tens	5 ones

These words are called place value headings.

hundreds	tens	ones
3 3 x 100 = 300	2 2 x 10 = 20	5 5 x 1 = 5

The number 325 is made up of :
five ones
two tens
and three hundreds

Use the base ten blocks to model the following number: 19 + 1 = 20

+ = once you have 10 unit cubes you can trade the 10 unit cubes in for a rod.

Now it would look like this

20
20 have 2 groups of ten (or rods)

Remember: To find the value of each digit, multiply the digit by its place-value position. In 5,432 the value of the 4 is 4 x 100, or 400.