M2N1.b: Understand the relative magnitudes of numbers using 10 as a unit, 100 as a unit, or 1000 as a unit. Represent 2-digit numbers with drawings of tens and ones and 3-digit numbers with drawings of hundreds, tens, and ones.

M2N2.a: Correctly add and subtract two whole numbers up to three digits each with regrouping.

M2N2.b: Understand and use the inverse relation between addition and subtraction to solve problems and check solutions.

M2N2.c: Use mental math strategies such as benchmark numbers to solve problems.

M2N2.d: Use basic properties of addition (commutative, associative, and identity) to simplify problems (e.g. 98+17 by taking two from 17 and adding it to the 98 to make 100 and replacing the original problem by the sum 100+15).

M2N3.b: Use repeated addition, arrays, and counting by multiples (skip counting) to correctly multiply 1-digit numbers and construct the multiplication table. Note: Skip counting only. Multiplication is addressed in unit 5.

M2N3.d: Use repeated subtraction, equal sharing, and forming equal groups to divide large collections of objects and determine factors for multiplication. Note: Only equal grouping will be assessed. Division is further addressed in unit 5.

M2N5.a: Include the use of boxes or ___ to represent a missing value.

M2N5.b: Represent problem solving situations where addition, subtraction or multiplication may be applied using mathematical expressions. Note: Addition and subtraction only. Multiplication will be addressed in unit 5.

Additional standards/elements introduced, developed, and/or briefly addressed in this unit:

M2N1.a: Represent numbers using a variety of models, diagrams, and numbers sentences (e.g., 4703 represented as 4,000 + 700 + 3, or 47 hundreds and 3 ones, or 4,500 + 203.)

M2N1.c: Use money as a medium of exchange. Count back change and use decimal notation and the dollar and cent symbols to represent a collection of coins and currency.