Lesson Plan: Adding & Subtracting Decimals

This lesson utilizes enVision Math, but ideas can be adapted for other texts.  Many of the hyperlinks will direct you to a place to download the resources used throughout this lesson. (Note: You must have ActivInspire downloaded to view the Promethean Board slides)

Subject: Math

Grade: 5th

Source: enVision Math 2.6 & 2.7 (2 day lesson)

Integration of Learning Outcomes:

· Students will be able to compute sums of decimals involving tenths, hundredths, and thousandths by making sense of problems and persevering in solving them, reasoning abstractly and quantitatively, constructing viable arguments and critiquing other’s reasoning, looking for and making use of structure, and looking for and expressing regularity in repeated reasoning. (enVision)

· Students will be able to compute differences of decimals involving tenths, hundredths, and thousandths by reasoning abstractly and quantitatively, constructing viable arguments and critiquing the reasoning of others, attending to precision, and looking for and making use of structure. (enVision)

Standards

· 5.NBT.7: Add and subtract decimals to hundredths, using strategies based on properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used.

· 5.NBT: Add and subtract decimals to hundredths using concrete models or drawings.

· M05.A-T.2.1: Use whole numbers and decimals to compute accurately (straight computation or word problem).

Lesson Plan: Problem Solving: Multi-Step Problems

This lesson utilizes enVision Math, but ideas can be adapted for other texts.  Many of the hyperlinks will direct you to a place to download the resources used throughout this lesson. (Note: You must have ActivInspire downloaded to view the Promethean Board slides)

Subject: Math

Grade: 5th

Source: enVision Math 2.8

Integration of Learning Outcomes

• Students will be able to use multi-steps to solve a variety of problems by making sense of problems and persevering in solving them, reasoning abstractly and quantitatively, attending to precision, looking for and making use of structure, and looking for and expressing regularity in repeated reasoning.

• Students will be able to add and subtract decimals by solving word problems.

 Standards

• 5.NBT.7: Add and subtract decimals to hundredths; relate the strategy to a written method and explain the reasoning used.

Anticipatory Set

· “Multi-step problems can be challenging. It is important to figure out what you know and what you need to know and to plan the steps necessary to solve the problem. Suppose you are given this problem:”

o   Julia wants to buy three pens at $1.99 each and two notebooks at $2.50 each. What is the total cost?

o   Students will list what they know, what they need to know, and the steps to solving the problem before solving the problem.

o   Drag the parts of the question into the appropriate column on the Promethean Board.

o   Students will write out the steps to solving the problem

§  Find the cost of three pens at $1.99 each. ($5.97)

§  Find the cost of two notebooks at $2.50 each. ($5.00)

§  Find the total cost. ($10.97)

o   Students will solve problem on their whiteboards.