Count the trains. Now choose the best answer. \(13 \, + \, 3 \, = \, x\)

\(1 \, ten \, + \, 3 \, ones \, = \, 13\)

\(1 \, ten \, + \, 3 \, ones \, = \, 19\)

\(3 \, tens \, + \, 1 \, one \, = \, 18\)

\(3 \, tens \, + \, 1 \, one \, = \, 13\)

\(1 \, ten \, + \, 3 \, ones \, = \, 13\)

Count the hats. Now choose the best answer. \(13 \, + \, 3 \, = \, x\)

\(1 \, ten \, + \, 3 \, ones \, = \, 13\)

\(3 \, tens \, + \, 1 \, one \, = \, 13\)

\(1 \, ten \, + \, 3 \, ones \, = \, 20\)

\(3 \, tens \, + \, 1 \, one \, = \, 10\)

Count the planes. Now choose the best answer. \(19 \, + \, 9 \, = \, x\)

\(1 \, ten \, + \, 9 \, ones \, = \, 19\)

\(1 \, ten \, + \, 9 \, ones \, = \, 18\)

\(9 \, tens \, + \, 1 \, one \, = \, 19\)

\(9 \, tens \, + \, 1 \, one \, = \, 20\)

Count Groups of Tens and Ones Up to 20 - Grade 1

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Grade 1 - Number and Operations in Base Ten

Standard 1.NBT.2a - Count the objects from 1 to 20. Split the number into tens and ones to complete the equation.

Included Skills:

Understand that the two digits of a two-digit number represent amounts of tens and ones. Understand the following as special cases: 10 can be thought of as a bundle of ten ones - called a "ten."

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