homework_remembering_te_grade_4-1zwawpi

3-8
Name
Date
Add or subtract.
1. 1,429
+ __ 3,882
5,311
2. 28,178
- 13,428
3. 500,000
- 61,835
__ __
14,750 438,165
Sketch an area model for each exercise. Then
find the product.
4. 27 × 59 1,593 5. 36 × 92 3,312
Check students’ models.
Solve using any method.
6. 9 ⟌ _ 30 R1
271 7. 6 ⟌ _ 406
2,436 8. 4 ⟌ _ 534 R3
2,139
9. Stretch Your Thinking Katherine is considering two
new cell phone plans. She doesn’t want to spend more
for minutes she won’t use. One plan allows up to
250 minutes per month for $49, and the other plan
allows up to 350 minutes per month for $65. In the
last 6 months, she used 1,470 minutes. Use estimating
and an exact answer to determine the best cell phone
plan for Katherine.
Possible answer: estimation 1,500 ÷ 5 = 300 minutes.
Exact 1,470 ÷ 6 = 245 minutes. Based on the exact
answer, Katherine could choose the plan with
250 minutes for $49.
© Houghton Mifflin Harcourt Publishing Company
82 UNIT 3 LESSON 8 Estimate to Check Quotients