A This Month™ National Empanada Day Math Celebration
K–1st Grade
K.NR.5.2 Represent addition and subtraction within 10 from a given authentic situation using a variety of representations and strategies.
1.PAR.3.2 Identify, describe, and create growing, shrinking, and repeating patterns based on the repeated addition or subtraction of 1s, 2s, 5s, and 10s.
2nd–3rd Grade
2.NR.3 Work with equal groups to gain foundations for multiplication through real-life, mathematical problems.
2.NR.3.2 Use addition to find the total number of objects arranged in rectangular arrays with up to 5 rows and up to 5 columns; write an equation to express the total as a sum of equal addends.
3.PAR.3.6 Solve practical, relevant problems involving multiplication and division within 100 using part-whole strategies, visual representations, and/or concrete models.
4th–5th Grade
4.NR.2.3 Solve relevant problems involving multiplication of a number with up to four digits by a 1-digit whole number or involving multiplication of two two-digit numbers using strategies based on place value and the properties of operations. Illustrate and explain the calculation by using equations, rectangular arrays, and/or area models.
K–1st Grade
NC.K.OA.6 Represent addition and subtraction, within 10: Use a variety of representations such as objects, fingers, mental images, drawings, sounds, acting out situations, verbal explanations, or expressions. Demonstrate understanding of addition and subtraction by making connections among representations.
NC.1.OA.6 Add and subtract, within 20, using strategies such as: counting on; making ten; decomposing a number leading to a ten; using the relationship between addition and subtraction; using a number line; creating equivalent but simpler or known sums.
2nd–3rd Grade
NC.2.OA.4 Use addition to find the total number of objects arranged in rectangular arrays with up to 5 rows and up to 5 columns; write an equation to express the total as a sum of equal addends.
NC.2.NBT.2 Count within 1,000; skip-count by 5s, 10s, and 100s.
K–1st Grade
1.OA.C.6 Add and subtract within 20, demonstrating accuracy and efficiency for addition and subtraction within 10. Use strategies such as counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); decomposing a number leading to a ten (e.g., 13 − 4 = 13 − 3 − 1 = 10 − 1 = 9); using the relationship between addition and subtraction (e.g., knowing that 8 + 4 = 12, one knows 12 − 8 = 4); and creating equivalent but easier or known sums (e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13).
2nd–3rd Grade
2.OA.C.4 Use addition to find the total number of objects arranged in rectangular arrays with up to 5 rows and up to 5 columns; write an equation to express the total as a sum of equal addends.
2.NBT.A.2 Count within 1000; skip-count by 5s, 10s, and 100s.
3.OA.A.1 Interpret products of whole numbers, e.g., interpret 5 × 7 as the total number of objects in 5 groups of 7 objects each. For example, describe and/or represent a context in which a total number of objects can be expressed as 5 × 7.