CCSS 1.NBT.C.5 Worksheets
Grade 1 · Number & Operations in Base Ten
Mentally find ten more or ten less than a two digit number without counting.
Below are free printable worksheets that support 1.NBT.C.5. Print them as PDFs, or generate a fresh one. Every math answer key is computed in code, so it is never wrong.
Teaching guide
What students learn
Mentally find ten more or ten less than a two digit number without counting.
How to teach it
Build numbers with base-ten blocks or bundles of ten, then say the value of each digit ('the 3 is worth 30'). Expand numbers (300 + 40 + 2).
Worked example
What is the value of the digit 6 in 3603?
Answer: 600
Generated and checked in code, so it is correct.
Watch out for
Reading a digit at face value regardless of its column, and dropping the zero as a place-holder (e.g. writing 32 for 302).
Place Value worksheets
All place value worksheets →Grade 2 Place Value
Set A · printable PDF · answer key
Grade 2 Place Value
Set B · printable PDF · answer key
Grade 2 Place Value
Set C · printable PDF · answer key
Grade 2 Place Value
Set D · printable PDF · answer key
Grade 2 Place Value
Set E · printable PDF · answer key
Grade 2 Place Value
Set F · printable PDF · answer key
Addition worksheets
All addition worksheets →Subtraction worksheets
All subtraction worksheets →Pre-K Subtraction
Set A · printable PDF · answer key
Pre-K Subtraction
Set B · printable PDF · answer key
Pre-K Subtraction
Set C · printable PDF · answer key
Pre-K Subtraction
Set D · printable PDF · answer key
Pre-K Subtraction
Set E · printable PDF · answer key
Pre-K Subtraction
Set F · printable PDF · answer key