Topic 11 Week 28 Mar. 4 , 2019

Topic 11 MAFS.1.NBT.3.5 (DOK 2) Given a two-digit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used. [Conceptual Understanding, Procedural Skills and Fluency] Identify the value of each digit in a number within 100. Explain how to mentally find 10 more or 10 less than a given two-digit number. Apply knowledge of place value to mentally add or subtract 10 to/from a given two digit number. MAFS.1.NBT.3.6 (DOK 2) Subtract multiples of 10 in the range 10-90 from multiples of 10 in the range 10-90 (positive or zero differences), 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. [Conceptual Understanding] · Identify the value of each digit of a number within 100. · Use concrete models or drawings to subtract multiples of 10 in the range of 10-90 from multiples of 10 in the range of 10-90 (positive or zero differences). · Choose an appropriate strategy (based on place value, properties of operations, and/or the relationships between addition and subtraction) for solving subtraction problems with multiples of 10. · Relate the chosen strategy to a written method (equation) and explain the reasoning used

70 – 10 = _______, so ____ + 10 = 70.

Mikenson has 70 toy cars. He gives 40 away Mikenson has 70 toy cars. He gives 40 away. How many toy cars does Mikenson have left? ____ - ____ = _____

Madison has 75 dolls. She gives 20 to her friend Madison has 75 dolls. She gives 20 to her friend. How many dolls does Madison have left?

Ms. Picallo has 90 Skittles. She gives 60 to her students Ms. Picallo has 90 Skittles. She gives 60 to her students. How many does she have left?

60 + _______ = 90, so 90 – 60 = _______.

How many more does Jayden bake? Write an equation to solve. Jayden bakes 80 cupcakes. Taylor bakes 50 cupcakes. How many more does Jayden bake? Write an equation to solve. Use drawings or models to show your work. MAFS Lesson 20 pg 131