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Number And Operations In Base Ten

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2.NBT.A.3 – NUMBER AND OPERATIONS IN BASE TEN

Read and write numbers to 1000 using base ten numerals, number names,

and expanded form.

The foundation of our base ten number system is a pattern of hundreds, tens, and ones.

Students need ample opportunity to work with concrete models of numbers in this range to

develop a sense of the relationships that exist among hundreds, tens, and ones. Prior to

working with the following problems students should be provided numerous opportunities to

build numbers using manipulatives and then writing than number, beginning with the

relationship with ones and tens and then moving on to tens and hundreds.

Keep in mind: An understanding of place value is developmental and is taught on a continuum.

It is important for students to have a firm understanding (prior knowledge) of 2 digit numbers

and the value of ones/tens before moving on to 3 and 4 digit numbers.

Directions: Write the number represented in word form.

Example of read and write numbers using base ten numerals and number names.

sixty three is:

forty seven is:

twenty six is:

thirty two is:

fifty four is:

seventy seven is:

one hundred twenty one is:

two hundred thirty six is:

one hundred forty three is:

10.

11.

12.

six hundred ten is:

four hundred fifty two is:

two hundred twenty nine is:

Directions: Read and complete the task.

Example of expanded form

The teacher asked Molly to write an equation

that is the same as 67. She wrote:

60 + 7 = 67

Do you agree? Explain

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Number And Operations In Base Ten