homework_remembering_te_grade_4-1zwawpi

2-13
Name
Date
Estimate each sum. Then solve to check
your estimate. Estimates may vary.
1. 289 + estimate: 300 +
503
500 = 800; exact: 792
2. 4,199 + 684
estimate: 4,200 + 700 = 4,900; exact: 4,883
3. 8,128 + 895
estimate: 8,000 + 900 = 8,900; exact: 9,023
Cross out the extra numerical information and solve.
Show your work.
4. Marlene is making 4 batches of muffins for her drama
party. Each batch requires 2 cups of flour and makes
24 muffins. How many muffins will Marlene have
for the party?
Extra: 2 cups of flour; 96 muffins
5. One pack of batteries costs $6 and contains 9 batteries.
Trevor bought 3 packs of batteries. How much did
Trevor spend on batteries?
Extra: 9 batteries; $18
Sketch an area model for each exercise. Then find the product.
6. 54 × 38 2,052
7. 49 × 75
Check students’ work.
3,675
8. Stretch Your Thinking Jackson used the Shortcut
Method to multiply 84 × 37. Did he do it correctly?
Explain.
No, Jackson did not align the place values correctly.
When he multiplied the 3 by the 4 and got 12, he
should have put the 2 in the tens place instead of
the ones place because it’s really 30 times 4, which
is 120. The correct answer 3,108.
1
2
84
× 37
588
+ 252
840
© Houghton Mifflin Harcourt Publishing Company
54 UNIT 2 LESSON 13 Different Methods for Two-Digit Multiplication