Grade 2 - Number
Standard 2.N.9 - Describe the picture using a subtraction equation.
Included Skills: Subtraction
Demonstrate an understanding of addition (limited to 1- and 2-digit numerals) with answers to 100 and the corresponding subtraction by • using personal strategies for adding and subtracting with and without the support of manipulatives • creating and solving problems that involve addition and subtraction • explaining that the order in which numbers are added does not affect the sum • explaining that the order in which numbers are subtracted may affect the difference • Model addition and subtraction using concrete materials or visual representations, and record the process symbolically. • Create an addition or a subtraction number sentence and a story problem for a solution. • Solve a problem involving a missing addend, and describe the strategy used. • Solve a problem involving a missing minuend or subtrahend, and describe the strategy used. • Match a number sentence to a missing addend problem. • Match a number sentence to a missing subtrahend or minuend problem. • Add a set of numbers in two different ways, and explain that the sum is the same (e.g., 2 + 5 + 3 + 8 = 2 + 3 + 5 + 8 or 5 + 3 + 8 + 2).