Lesson 2

Tenths

Est. Class Sessions: 2–3

Daily Practice and Problems

Teacher Notes
X

TIMS Task

Refer students to the Addition, Subtraction, and Multiplication Strategies Menus in the Student Guide Reference section.

    1. 927
    2. 2883
    3. 6527
    4. 4649
    5. 658
    6. 114
    7. 114
    8. 3225
    9. 468
    10. 261
  2. Possible response:
    150 + 800 = 950
  3. Possible strategy for Question 1J:
    90 × 3 = 270 and
    3 × 3 = 9;
    270 − 9 = 261.

H. Addition, Subtraction, and Multiplication Practice

Use paper and pencil or mental math to solve the following problems. Be sure to estimate to see if your answers make sense. Use the Strategies Menus in the Student Guide Reference section.

    1. 148 + 779 =
    2. 2090 + 793 =
    3. 7084 − 557 =
    4. 5386 − 737 =
    5. 94 × 7 =
    6. 38 × 3 =
    7. 57 × 2 =
    8. 4068 − 843 =
    9. 52 × 9 =
    10. 87 × 3 =
  2. Show or tell how you estimated to see if your answer to Question 1A is reasonable.
  3. Which problems in Question 1 did you solve using mental math? Choose one and show or tell how to solve it using mental math.
  4. Use addition to show that your answer for Question 1H is correct.