Terminology

New or Recently Introduced Terms

 Make a ten (compose a unit of ten, e.g., 49 + 3 = 40 + 10 + 2)

Familiar Terms and Symbols8

 Addend (one of the numbers being added)

 A ten (a place value unit composed of 10 ones)

 Count on (count up from one addend to the total)

 Expression (e.g., 2 + 1, 13 – 6)

 Like units (e.g., frogs and frogs, ones and ones, tens and tens)

 Make ten and take from ten (e.g., 8 + 3 = 8 + 2 + 1 and 15 – 7 = 10 – 7 + 5 = 3 + 5)

 Number sentence (e.g., 2 + 3 = 5, 7 = 9 – 2, 10 + 2 = 9 + 3)

 Number bond (see image to the right)

 One (a place value unit, 10 of which may be composed to make a ten)

 Part (e.g., “What is the unknown part? 3 + ___ = 8”)

 Partners to 10 (e.g., 10 and 0, 9 and 1, 8 and 2, 7 and 3, 6 and 4, 5 and 5)

 Say Ten counting (see the chart to the right)

 Ten plus facts (e.g., 10 + 3 = 13, 10 + 5 = 15, 10 + 8 = 18)

 Total (e.g., for 3 + 4 = 7 or 7 – 4 = 3, seven is the whole, or total)