Adding and Subtracting in Space

Est. Class Sessions: 2–3

4.NBT.B: Use place value understanding and properties of operations to perform multi-digit arithmetic. (4.NBT.B.4)
4.OA.A: Use the four operations with whole numbers to solve problems. (4.OA.A.3)

Students explore strategies for rounding, estimating, and computing to solve addition and subtraction word problems.

Rounding numbers to the nearest tens, hundreds, and thousands.
Estimating sums and differences [E11].
Solving word problems involving addition and subtraction.
Choosing appropriately from among mental math, estimation, and paper-and-pencil methods [E9].
Reading and interpreting data from tables.
Reading problems carefully to find what information is important [MPE1].
Communicating mathematically thinking clearly in words and in writing [MPE5].

Daily Practice and Problems U–X

		Daily Practice and Problems	Lesson	Homework	Assessment
Student Books	Student Guide		Adding and Subtracting in Space Pages 146–150	Adding and Subtracting in Space Homework section Page 151	Math Practices Reference
Teacher Resources	Teacher Guide - digital	DPP Item U DPP Item V DPP Item W DPP Item X	Addition and Subtraction Quiz		Addition and Subtraction Quiz

When Do We Estimate? Master (Teacher Guide)
Display of the Math Practices page (Student Guide) Reference
Unit 4 Assessment Record

Assessment	Expectation Assessed	Math Practice Assessed
Addition and Subtraction Quiz with Feedback Box Teacher Guide - digital	E1. Show that different partitions of the same number are equal using base-ten pieces, number lines, and number sentences (e.g., 200 + 30 + 7 = 200 + 20 + 17). E2. Represent and solve addition problems using base-ten pieces and number lines. E3. Represent and solve subtraction problems using base-ten pieces and number lines. E4. Solve addition and subtraction problems using mental math strategies(e.g., composing and decompressing numbers, counting up, and counting back). E6. Add multidigit numbers using paper-and-pencil methods (expanded form, all-partials, and compact). E7. Subtract multidigit numbers using paper-and-pencil methods (expanded form and compact). E9. Choose appropriately from among mental math, estimation, and paper-and-pencil methods to add and subtract whole numbers. E11. Estimate sums and differences.	MPE1. Know the problem. I read the problem carefully. I know the questions to answer and what information is important. MPE5. Show my work. I show or tell how I arrived at my answer so someone else can understand my thinking.

Lesson 6