Common Core: Number & Operations in Base Ten
2.NBT.A3
Read and write numbers to 1000 using base-ten numerals, number names, and expanded form.
October 1, 20182.NBT.A4
Compare two three-digit numbers based on meanings of the hundreds, tens, and ones digits, using >, =, and < symbols to record the results of comparisons.
October 1, 20182.NBT.A1
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:
October 1, 20181.NBT.A1
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.
October 1, 20181.NBT.B2
Understand that the two digits of a two-digit number represent amounts of tens and ones. Understand the following as special cases:
October 1, 20181.NBT.B2b
The numbers from 11 to 19 are composed of a ten and one, two, three, four, five, six, seven, eight, or nine ones.
October 1, 20181.NBT.B2c
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).
October 1, 20181.NBT.B3
Compare two two-digit numbers based on meanings of the tens and ones digits, recording the results of comparisons with the symbols >, =, and
October 1, 20181.NBT.C4
Add within 100, including adding a two-digit number and a one-digit number, and adding a two-digit number and a multiple of 10, 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. … Read More “1.NBT.C4”
October 1, 2018