This is an assessment on beginning to mentally add ten more and ten less. It has the students draw a number and then draw ten more and take away ten to determine the new number. There is also a word problem to assess this skill.
I've also included a few half sheets to quickly assess this standard throughout the week. It helped me determine who needs remediation BEFORE the assessment.
The common core standard is:
MCC1.NBT.5 Given a two-digit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used.