Ordering Numbers and Counting to 120
Skill: Ordering two-digit numbers and counting on to 120
Download PDF worksheetAnswer key (PDF)
Free for personal and classroom use. Print at 100% / "Actual size" on US Letter paper.
About this worksheet
This first-grade worksheet builds number sense in two ways. In Part A, children look at six sets of four two-digit numbers and write each set in order from least to greatest. In Part B, they fill in missing numbers in six counting sequences that go as high as 120, which means some rows cross from the 90s into the 100s.
Ordering numbers depends on place value. To compare 47 and 74, children need to know that the first digit tells how many tens. The number with more tens is greater, and if the tens are the same, the ones decide. Crossing 100 in Part B is also an important milestone, because children see that after 99 comes 100, then 101, 102, and so on.
How to use it: for Part A, have your child first find the number with the fewest tens, write it, and cross it out. Repeat until all four are written. A hundred chart is a great support for children who are still building confidence. For Part B, encourage your child to say the numbers aloud as they count, and point out the patterns in the ones digit.
The answer key gives each set in order and every missing number. This worksheet supports Common Core standards 1.NBT.A.1 (count to 120, starting at any number less than 120, and read and write numerals) and 1.NBT.B.3 (compare two two-digit numbers based on the meanings of the tens and ones digits).
Count and Trace Numbers 1-10
Addition Within 10
Subtraction Within 10