Understand that the two digits of a two-digit number represent amounts of tens and ones. Understand the following as special cases:
Number and Operations in Base Ten
Understand place value.
Understand that the two digits of a two-digit number represent amounts of tens and ones. Understand the following as special cases:
Number and Operations in Base Ten
Understand place value.
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10 can be thought of as a bundle of ten ones — called a “ten.”
The numbers from 11 to 19 are composed of a ten and one, two, three, four, five, six, seven, eight, or nine ones.
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).
Use place value understanding and properties of operations to add and subtract.
Use place value understanding and properties of operations to perform multi-digit arithmetic.
Understand that the three digits of a three-digit number represent amounts of hundreds, tens, and ones; e.g., 706 equals 7 hundreds, 0 tens, and 6 ones. Understand the following as special cases:
The numbers 100, 200, 300, 400, 500, 600, 700, 800, 900 refer to one, two, three, four, five, six, seven, eight, or nine hundreds (and 0 tens and 0 ones).
Understand that the two digits of a two-digit number represent amounts of tens and ones. Understand the following as special cases:
Understand that the two digits of a two-digit number represent amounts of tens and ones. Understand the following as special cases:
Understand that the two digits of a two-digit number represent amounts of tens and ones. Understand the following as special cases:
Understand that the two digits of a two-digit number represent amounts of tens and ones. Understand the following as special cases:
Understand that the two digits of a two-digit number represent amounts of tens and ones. Understand the following as special cases: