## Grade 1 Math: Numbers 21-100, Part 1

### Read and Write Numbers: By Ten 21-100

In this lesson, students learn to read and write the names for groups of tens from twenty, which is two groups of ten, through one hundred, which is ten groups of ten.

In the problems in this lesson, students read and write the numbers in three formats: 1) they are given the number in words and they write the number, 2) they are given the number and they select the words for the number, and 3) they hear the number spoken and they write the number.

### Read and Write Numbers 21-100

In this lesson, students learn that all the numbers from twenty through 100 are written as groups of tens and ones.

In the problems in this lesson, students read and write the numbers from twenty through one hundred in three formats: 1) they are given the number and they select the words to write the number, 2) they are given the number represented in ten frames and they write the number, and 3) they hear the number spoken and they write the number.

### Reading Numbers in Context 21-100

In this lesson, students learn to recognize numbers from 21 to 100 written in words in the context of a situation.

They read the sentence then write the number described in the sentence.

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