Estimating Sums and Differences to the Nearest 10

In the equation 497.55 - 265.41 = 232.14, the number 232.14 is the _________________

• difference

• quotient

• compatible numbers

Tags

CCSS.6.NS.B.3

Round to the nearest TEN to find the sum:

19.36 + 12.88

• 32.24

• 31

• 32

• 30

Estimating is finding a value that is CLOSE or APPROXIMATE to the actual value, but it's not exact.

• True

• False

What are compatible numbers?

• Two of the same numbers.

• Numbers that have the same digit in the ones place.

• Pairs of numbers that are easy to add, subtract, multiply, or divide mentally.

• Numbers that have the same amount of digits.

Tags

CCSS.4.NBT.B.5

Estimate the sum of 471 + 529. Round to the nearest 10.

• 800

• 900

• 1000

• 1100

Estimate 345 + 481 by rounding each number to the nearest ten. 

• 1,200

• 830

• 840

• 1,300

Mrs. Wright went shopping on Saturday. She spent $134 at the grocery store, $48 at the mall and $181 at the sports store. What is the best estimate of how much money Mrs. Wright spent on Saturday?

• $365

• $363

• $360

• $250

Rick feeds his cats 24oz of food each day. What is the best estimate of the number of ounces of food he will feed them in the Month of March which is 31 days?

• 600

• 900

• 800

• 750

Tags

CCSS.4.NBT.B.5

Estimate by rounding to the nearest ten: 23.78 + 45.10

• 60

• 68

• 70

• 68.9

Ronnie has three planks of wood. The first plank is 27 inches long. The second plank is 44 inches long. The third plank is 18 inches long. Rounded to the nearest tens, what is the best estimate of the total length of these three planks in inches?

• 100 inches

• 90 inches

• 80 inches

• 89