2 Digit by 1 Digit
Problem Solving
Inspecting Equations
Estimating Products
Various
100
45 x 6 = ? Show 2 different strategies.
What is 270?
100
Emma has 10 groups of pennies with 7 pennies in each group. Jack has 3 groups of pennies with 100 pennies in each group. Who has more pennies?
What is Jack, because 3 x 100 = 300 and 10 x 7 = 70.
100
4 x t = 36. Solve for t.
What is 9 because 4 x 9 = 36.
100
Kenny has 7 pouches. Each pouch has 21 marbles. About how many marbles does Kenny have?
What is 140, because 21 rounds to 20 and 20x7=140.
100
400 x 8 = x , Solve for x. Show 2 ways to solve.
What is 3200?
200
27 x 4 = ? Show 2 different strategies.
What is 108.
200
Mr. Young 200 times as many pencils as Travis. If Travis has 7 pencils, how many pencils does Mr. Young have?
What is 1400 because 200 x 7 = 1400.
200
(5 x r) + (3 x r) = 56. Solve for r.
r = 7 because 5x7 + 3x7 = 35+21=56
200
Ursula has an album in which she keeps pressed flowers. The album has 34 pages, and each page has 7 pressed flowers. Which of the following shows a reasonable estimate of how many pressed flowers Ursula has? 30x7=210, 40x7=280, 50x5=250, 60x4=240.
What is 30x7=210 because 34 rounds to 30.
200
A group of 9 students want to share 72 counters equally. How many counters should each student get?
What is 8 counters because 72 / 9=8.
300
53 x 6 = ? Show 2 different strategies.
What is 318.
300
There are 33,201 people living in Harold’s town. There are 8,295 people living in Nancy’s town. How many people live in both towns?
41,496 people
300
56 / a = 8. Solve for a.
a = 7 because 56 / 7 = 8
300
Erika wants to give 5 stickers to everyone in her class. Her class sits in 4 rows of 7, and Erika says she’ll need 140 stickers. Is this reasonable, why?
Yes, because 4 rows of 7 =28 and 28x5 = 140.
300
Harmony got a score of 23,486 points while playing a video game. The highest score ever for the game was 25,958. How many more points would Harmony need to tie the highest score?
What is 2,472 points?
400
63 x 4 = ? Show 2 different strategies.
What is 252?
400
A classroom has 32 desks arranged in 4 rows. Each row has an equal number of desks. How many desks are in each row?
What is 8 because 32 / 4= 8?
400
(89 + y) = 55 + 45. Solve for y.
y = 11 because 89+11 = 100 = 55+45
400
Estimate to find the answer to 803 × 7.
What is 800 x 7 = 560?
400
There are 30 rows of apple trees in an apple orchard. If there are 9 trees in each row, how many trees are there in all?
What is 270 trees because 30x9=270.
500
48 x 4 = ? Show 2 different strategies.
What is 192?
500
Davidson’s Bakery uses 9 dozen eggs to make cookies each day. There are twelve eggs in one dozen. How many eggs do they use?
What is 108 eggs?
500
(4 x s) - (2 x s) = 18 + 22 - 28. Solve for s.
s = 6 because (4x6) - (2x6) = 12 = 18+22-28
500
Estimate to find the answer to 709 × 4
What is 280, because 709 rounds to 700.
500
Use the numbers 7, 8, and 56 to write a fact family. Include 2 multiplication and 2 division facts.
What is 7x8=56, 8x7=56, 56/7=8, 56/8=7.
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