MathsheetsMake a worksheet →1.NBT.B.2
The left digit counts tens and the right digit counts ones.
Worksheets for this standard 1 topic
The standard, officially
Understand that the two digits of a two-digit number represent amounts of tens and ones. Understand the following as special cases:
This standard has parts
a
10 can be thought of as a bundle of ten ones — called a “ten.”1.NBT.B.2a
b
The numbers from 11 to 19 are composed of a ten and one, two, three, four, five, six, seven, eight, or nine ones.1.NBT.B.2b
c
The numbers 10, 20, 30, 40, 50, 60, 70, 80, 90 refer to one, two, three, four, five, six, seven, eight, or nine tens (and 0 ones).1.NBT.B.2c