Number and Operations in Base Ten

1.NBT.1Count forward and backward within 120, starting at any given number. Read and write numerals within 120. Represent a number of objects up to 120 with a written numeral.1.NBT.2Demonstrate understanding that the two digits of a two-digit number represent amounts of tens and ones, including:1.NBT.3Compare two two-digit numbers based on meanings of the tens and ones digits, recording the results of comparisons with the symbols >, =, and <.1.NBT.4Demonstrate understanding of place value when adding two-digit numbers within 100. Use concrete models or drawing strategies based on place value, properties of operations, and/or the relationship between addition and subtraction to add and subtract within 100. Relate the strategy to a written method and explain the reasoning used.1.NBT.5Mentally add or subtract 10 to or from a given two-digit number. Explain the reasoning used.1.NBT.6Use concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction to subtract multiples of 10 in the range of 10-90 from multiples of 10 in the same range resulting in a positive or zero difference. Use a written method to explain the strategy.
Goblins

1-on-1 AI tutoring aligned to 1.NBT. Instant help for students, real-time insights for teachers.

Used in classrooms by 100,000+ students at Baltimore County, Plano ISD, Deer Valley USD, KIPP, and districts nationwide.

Free for teachers, forever →