Lesson 6

Write and Solve Problems

Est. Class Sessions: 2
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Mathematical Standards

2.OA.A
Represent and solve problems involving addition and subtraction. (2.OA.A.1)
2.OA.B
Add and subtract within 20. (2.OA.B.2)
2.OA.C
Work with equal groups of objects to gain foundations for multiplication. (2.OA.C.4)
2.G.A
Reason with shapes and their attributes. (2.G.A.2)

Standards for Mathematical Practice

MP1.
Make sense of problems and persevere in
solving them.
MP2.
Reason quantitatively.
MP3.
Construct viable arguments and critique the reasoning of others.
MP4.
Model with mathematics.
MP5.
Use appropriate tools strategically.
MP6.
Attend to precision.
MP7.
Look for and make use of structure.
MP8.
Look for and express regularity in repeated reasoning.

Students write their own multiplication and division problems related to events or characters in familiar stories. They listen to Each Orange Had 8 Slices by Paul Giganti, Jr., and solve some of the problems presented in the book.

Content in this Lesson

  • Representing multiplication and division problems using drawings and number sentences [E2].
  • Writing stories for multiplication and division sentences [E4].
  • Solving multiplication and division problems using strategies
    (e.g., skip counting, repeated addition) with tiles, drawings, number lines, rectangular arrays, and number sentences [E7].
  • Dividing a set of objects into equal-size groups [E8].
  • Using labels to show what numbers mean [MPE6].
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Materials for Students

Daily Practice and Problems Lesson Homework Assessment

Student Book

 Student Activity Book

Teacher Resources

 Teacher Guide - digital

Supplies for Student Pairs

30 connecting cubes or square tiles
plain white paper or drawing paper, 1–2 per student pair
desk number line (0–100)
colored pencils or markers

Materials for the Teacher

Display of Steps for Writing “What if” Problems Master (Teacher Guide)
Display of Each Orange Had 8 Slices Problems Masters (Teacher Guide)
Unit 12 Assessment Record
Unit 12 Individual Assessment Record
Each Orange Had 8 Slices by Paul Giganti, Jr. or Sea Squares by Joy N. Hulme
colored pencils or markers
drawing paper, optional

Materials Preparation

Prepare Optional Targeted Practice. In a learning center, place plain white paper or drawing paper and a copy of the Steps for Writing “What if” Problems Master. Have students draw a picture and write number sentences for each problem. Provide sample multiplication and division situations related to familiar stories. Some examples are:

  • George and Martha have 10 balloons each.
  • Frog and Toad share 14 buttons equally.
  • Big Anthony has 15 carrots to place equally in 5 pots.
  • Jack and Annie see 3 triceratops with 3 horns each.

Assessment in this Lesson

Assessment Expectation Assessed MATH PRACTICES EXPECTATION ASSESSED
More “What if” Problems
Student Activity Book
Pages 631–632
E2.
Represent multiplication and division problems using tiles, drawings, number lines, rectangular arrays, and number sentences.
E4.
Write stories for multiplication and division sentences.
E7.
Solve multiplication and division problems using strategies (e.g., skip counting, repeated addition) with tiles, drawings, number lines, rectangular arrays, and number sentences.
E8.
Divide a set of objects into equal-size groups.
MPE6.
Use labels. I use labels to show what numbers mean.

Vocabulary in this Lesson