Ones, Tens & Hundreds

Developing an understanding of whole number relationships and place value, including grouping in tens and ones. Understanding addition statements.

Mapped to CCSS Section# 1.NBT.A.1, 1.NBT.C.6, 1.NBT.B.2, 1.NBT.B.2c, 2.NBT.A.1

Count to 120, starting at any number less than 120. In this range, read and write numerals and represent a number of objects with a written numeral.,Subtract multiples of 10 in the range 10-90 from multiples of 10 in the range 10-90 (positive or zero differences), using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used.,Understand that the two digits of a two-digit number represent amounts of tens and ones. Understand the following as special cases:,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).,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:
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