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Reasonableness
Estimate and Solve
Area Model
100
22 X 7
What is 154
100
36 X 45
What is 1,620
100
Ellery has $40.00 and thinks she has enough money to buy some stuff at Target. She wants two shirts that cost 6.95 each, and a book that cost 22.75. What is the reasonableness of her answer? Explain
What is $39.00 Yes, because....
100
88 X 8
What is 720
100
Draw an area model to solve: 53 x 7=
371
200
85 X 4
What is 340
200
87 X 64
What is 5,568
200
Evan wants to buy 8 packs of Pokemon cards for his friends Each pack cost $1.79. He grabs $12.00 as he runs out the door. What is the reasonableness of his decision? Explain.
What is $16.00. No, because
200
38 X 4
What is 160
200
Draw an area model to solve: 62 x 9
What is 558
300
984 X 6=
What is 5,904
300
91 X 16=
What is 1,456
300
Gio has 150.00 that his Grandma gave him. He decides he wants to buy some games for his PS3. One game cost 52.75 and two other games cost 64.95 each. He thinks he will have enough for all three games. What is the reasonableness of his thinking. Explain.
What is 140.00. No, because...
300
682 X 9
What is 6,300
300
Draw an area model to solve: 81 x 4
What is 324
400
328 X 6
What is 1,968
400
47 X 13
What is 611
400
Mrs. Rickman wants to buy hot coco for every kid in class. The coco packets cost .94 cents each. If she has 27 kids in her class, she thinks 30.00 will cover the cost. What is the reasonableness of her thinking. Explain.
What is 27.00. Yes, because...
400
288 X 6
What is 1,800
400
Draw an area model to solve: 64 x 8
What is 512
500
8,956 X 7
What is 62,692
500
140 X 52
What is 7,280
500
Bri went out to eat with her family. She had 50.00 to spend. She ordered sandwich and fries for 14.95 and a drink for 7.95. Her brother James, ordered a burger for 12.10 and a drink for 5.25. Bri thinks she has enough to pay for their meal. Explain the reasonableness of her thinking.
What is 40.00. Yes, because...
500
569 x 4
What is 2,400
500
Draw an area model to solve: 65 x 6
What is 270