Price: 275 points or $2.75 USD
Subjects: math
Grades: 13,1,2
Description: This is a 20 card deck with voice prompts. Students use a 100 chart to identify 10 more, 10 less, 1 more and 1 less. Common Core State Standard 1.NBT.C.5 Given a two-digit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used.