Skip to content
Science
Math
Engineering
Home
Browse
Search
Settings
Plans
About us
My courses
Pick your grades or college fields to pin them here.
SME
Browse
Grade 1
Number & Base Ten
Browse
Grade 1
Number & Base Ten
Grade 1 Math

Number & Base Ten

Count and write numbers to 120

Main lesson
Find 1 less and 10 less
Use this for “What is 1 less? What is 10 less?” on the 120 chart.
Count on a number chart to 120
Use this for a piece of the 120 chart with numbers missing.

Place value: tens and ones

Main lesson
Different names for the same number
Use this for “How many cubes? 3 towers of 10 and 14 more.”
Compare two-digit numbers
Use this for “Which number is greater, 63 or 47?”
Compare numbers using symbols
Use this for “Put a < or > in each box: 82 ___ 28.”

Add within 100 using place value

Main lesson
Add two-digit numbers
Use this for “Find the value of 27 + 46.”
Subtract tens
Use this for “Find the value of 80 − 30.”
Science
Math
Engineering
About us
Plans
Support
Terms
Privacy
Copyright
© 2026 SME. All rights reserved.