1.4 Unit Overview

Develop an understanding of place value for numbers up to `99`.

By Amplify Classroom

Grades: 1st Grade

Subject: Math

Learning goals: Unit at a Glance Sub-Unit 1: Units of Ten (Lessons 1–6) • Represent the base-ten structure of two-digit multiples of `10`. • Add and subtract two-digit multiples of `10`. Sub-Unit 2: Tens and Ones (Lessons 7–13) • Understand that the 2 digits of a two-digit number represent amounts of tens and ones. • Add two-digit numbers and multiples of `10`. • Mentally find `10` more and `10` less than a two-digit number. Sub-Unit 3: Comparing Numbers to 99 (Lessons 14–19) • Use place value understanding to compare 2 two-digit numbers, and record comparisons using the `<`, `>`, and `=` symbols. Sub-Unit 4: Different Ways To Make a Number (Lessons 20–22) • Create and interpret equivalent base-ten representations for two-digit numbers that show different amounts of tens and ones.