Count the batteries. Now choose the best answer. \(20 \, + \, 0 \, = \, x\)

\(2 \, tens \, + \, 0 \, ones \, = \, 20\)

\(0 \, tens \, + \, 2 \, ones \, = \, 20\)

\(0 \, tens \, + \, 2 \, ones \, = \, 14\)

\(2 \, tens \, + \, 0 \, ones \, = \, 17\)

\(2 \, tens \, + \, 0 \, ones \, = \, 20\)

Count the lamps. Now choose the best answer. \(10 \, + \, 0 \, = \, x\)

\(1 \, ten \, + \, 0 \, ones \, = \, 10\)

\(1 \, ten \, + \, 0 \, ones \, = \, 13\)

\(1 \, ten \, + \, 0 \, ones \, = \, 10\)

\(0 \, tens \, + \, 1 \, one \, = \, 10\)

\(0 \, tens \, + \, 1 \, one \, = \, 18\)

Count the cars. Now choose the best answer. \(16 \, + \, 6 \, = \, x\)

\(1 \, ten \, + \, 6 \, ones \, = \, 16\)

\(6 \, tens \, + \, 1 \, one \, = \, 17\)

\(1 \, ten \, + \, 6 \, ones \, = \, 16\)

\(6 \, tens \, + \, 1 \, one \, = \, 16\)

\(1 \, ten \, + \, 6 \, ones \, = \, 13\)

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

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Grade 1 - The Number System

Standard 1.NS.1.3 - Count the objects from 1 to 20. Split the number into tens and ones to complete the equation.

Included Skills:

Students will be expected to demonstrate an understanding of counting to 20 by
• indicating that the last number said identifies 'how many'
• showing that any set has only one count
• using the counting-on strategy

• Performance Indicators
- N03.01 Answer the question, How many are in the set? using the last number counted in a given set.
- N03.02 Identify and correct counting errors in a given counting sequence.
- N03.03 Show that the count of the number of objects in a given set does not change regardless of the order in which the objects are counted.
- N03.04 Record the number of objects in a set using the numeral symbol.
- N03.05 Determine the total number of objects in a given set, starting from a known quantity and counting on.

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