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.
Teach this standard
Deliver a whole lesson on 1.NBT.C.5 from a textbook-grade teaching unit, with a hook, worked examples, diagrams, misconceptions, and an exit ticket.
Teaching guide
Mentally find ten more or ten less than a two digit number without counting.
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).
Generated and checked in code, so it is correct.
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 →Sets A-F are the same worksheet with different questions - print any (or all) for fresh practice.
Addition worksheets
All addition worksheets →Sets A-F are the same worksheet with different questions - print any (or all) for fresh practice.
Subtraction worksheets
All subtraction worksheets →Sets A-F are the same worksheet with different questions - print any (or all) for fresh practice.