53 min(s)

53 min(s)

- 1.NBT.B.2

Major StandardsSupporting StandardsAdditional Standards

Standard 1.NBT.B.2### 1 Math Practice Standard is aligned with this lesson

### Prerequisites for 1.NBT.B.2

Understand that the two digits of a two-digit number represent amounts of tens and ones. Understand the following as special cases:

Part of Major Cluster 1.NBT.B

1.NBT.B.2.A

10 can be thought of as a bundle of ten ones - called a "ten."

1.NBT.B.2.BThe 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.2.CThe 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).

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