Math Games

Grade 2 - Number

Standard 2.N.7 - Make a specific number by regrouping tens and ones.

Included Skills:

Illustrate, concretely and pictorially, the meaning of place value for numbers to 100.
• Explain and show with counters the meaning of each digit for a 2-digit numeral with both digits the same (e.g., for the numeral 22, the first digit represents two tens [twenty counters] and the second digit represents two ones [two counters]).
• Count the number of objects in a set using groups of 10s and 1s, and record the result as a 2-digit numeral under the headings of 10s and 1s.
• Describe a 2-digit numeral in at least two ways (e.g., 24 as two tens and four ones, twenty and four, two groups of ten and four left over, and twenty-four ones).
• Illustrate using 10 frames and diagrams that a numeral consists of a certain number of groups of 10 and a certain number of 1s.
• Illustrate using proportional base-10 materials that a numeral consists of a certain number of tens and a certain number of ones.
• Explain why the value of a digit depends on its placement within a numeral.