Addition and subtraction relationships
- facts within 20
- unknown positions
- make-ten strategies
Grade 1 · typical sequence
Grade 1 connections
Connect visible quantities to flexible facts, equations, place value, time, and data.
Two-digit place value
- count to 120
- compare two-digit numbers
- ten more or less
Measure, tell time, and partition shapes
- equal units
- hour and half-hour
- halves and fourths
- simple data
Practice inventory
19 deterministic activities are available now.
Add within 10
Join or separate small quantities accurately.
Subtract within 10
Join or separate small quantities accurately.
Add within 20
Use number relationships and make-ten thinking within 20.
Subtract within 20
Use number relationships and make-ten thinking within 20.
Find the unknown in a story
Represent adding to, putting together, taking from, and comparing with an unknown in different positions.
Add three small groups
Combine or separate quantities while keeping track of each part.
Is the equation true?
Treat the equal sign as a claim that both sides have the same value.
Find the missing number
Use the relationship between addition and subtraction to find an unknown.
Make a ten to add
Break apart an addend to make a friendly ten.
Continue toward 120
Continue a number sequence and connect numerals to quantities beyond 20.
Compare two-digit numbers
Compare tens first, then ones when the tens match.
Ten more or ten less
Change the tens while preserving the ones.
Add a one-digit number
Combine tens and ones, composing a new ten when needed.
Subtract groups of ten
Use the value of tens to subtract without counting every one.
Measure with equal units
Place equal-size units end to end with no gaps or overlaps.
Tell time to the half hour
Connect analog clock hands with hour and half-hour digital times.
Read a picture graph
Read category counts in a picture graph where each picture represents one vote.
Which attribute defines it?
Separate defining attributes such as sides from non-defining attributes such as color.
Halves and fourths
Split circles and rectangles into two or four equal parts and name the shares.