PEMDAS: Solve, "Multiply the difference between 5,900 and 5,000 by 6."
5400
Oops!
Check
Okay!
Check
15
You are multiplying 197 x 750. You got an answer of 147,750. Is it reasonable? Why or why not?
It's reasonable! You can round the factors to 200 x 800, but both factors rounded up, so your answer should be a bit less than 160,000.
Oops!
Check
Okay!
Check
15
Without calculating, compare the two expressions using <, >, or =: 2 x (5 x 7) _____ 6 x 10
10 x 7 > 10 x 6
Oops!
Check
Okay!
Check
lifesaver
Give 25 points!
Oops!
magnet
Take 15 points!
Okay!
gift
Win 15 points!
Okay!
banana
Go to last place!
Oops!
15
Use the standard algorithm to solve 213 × 251.
(Use the standard algorithm to get rows: 753 + 2510 + 50,200 = 53,463. Or 213 + 10,650 + 42,600 = 53,463.)
Oops!
Check
Okay!
Check
15
414.21 × 31
1,284,051 hundredths --> 12,840.51
Oops!
Check
Okay!
Check
15
PEMDAS: Write (85 + 15) x 38 in words.
thirty-eight times the sum of eighty-five and fifteen
Oops!
Check
Okay!
Check
lifesaver
Give 15 points!
Oops!
gift
Win 10 points!
Okay!
gift
Win 20 points!
Okay!
thief
Give points!
5
10
15
20
25
thief
Give points!
5
10
15
20
25
seesaw
Swap points!
Okay!
fairy
Take points!
5
10
15
20
25
baam
Lose 10 points!
Oops!
15
Estimate the product of 9,852 x 126.
≈ 10,000 x 100 = 1,000,000 OR 10,000 x 120 = 1,200,000.
Oops!
Check
Okay!
Check
15
PEMDAS: Write a numerical expression for the words, "Multiply the difference between 5,900 and 5,000 by 6."
(5,900 - 5,000) x 6
Oops!
Check
Okay!
Check
25
Sophia is designing bracelets to sell at a jewelry market. Each bracelet requires 2.25 feet of cord. At the craft store, cord is sold by the yard. If Sophia wants to make 96 bracelets, how many yards of cord must she buy?
2.25 × 96 = 216 feet --> 72 yards. Sophia must buy 72 yards of cord.
Oops!
Check
Okay!
Check
15
A bottle contains 4.275 liters of water. How much water is in 10 bottles?
