Rounding Numbers 10's or 100's
Rounding to Estimate
Estimating Word Problems
100
Round the number to the nearest given place value.
a. Round 89 to the nearest ten ___
b. Round 89 to the nearest hundred ___
c. Round 599 to the nearest ten ___
d. Round 599 to the nearest hundred ___
a. Round 89 to the nearest ten 90
b. Round 89 to the nearest hundred 100
c. Round 599 to the nearest ten 600
d. Round 599 to the nearest hundred 600
100
Choose the expression that best identifies how the sum could be estimated by rounding to their nearest hundred.
281 + 125
300+100
100
Toby has 329 treats and 352 toys at home. To the nearest hundred, about how many total treats and toys does he have?
a. About 300
b. About 500
c. About 600
d. About 700
d. 329 + 352 = 681 This rounds to about 700
200
Is the statement true or false?
a. 777 rounded to the nearest hundred is 700
b. 111 rounded to the nearest ten is 110
c. 449 rounded to the nearest hundred is 450
d. 449 rounded to the nearest ten is 450
a. false
b. true
c. false
d. true
200
Choose the expression that best identifies how the sum could be estimated by rounding to their nearest hundred.
242+128
200+100
200
The ice cream shop sold 234 cones of ice cream on Monday. On Tuesday the ice cream shop sold 372 cones on Thursday. What is the best estimate of how many ice cream cones were sold on Tuesday and Thursday?
About 600 cones were sold on Tuesday and Thursday.
300
What is the smallest and largest number that can round to 400?
smallest: 350
largest: 449
300
Choose the expression that best identifies how the sum could be estimated by rounding to their nearest hundred.
236+119
200+100
300
Murphy rounded a number to the nearest 10 and the result was 30.
What is the smallest Murphy's number can be?
What is the largest Murphy's number can be?
smallest: 25
largest: 34
400
Which numbers round to 600 when rounded to the nearest hundred?
A. 594
B. 544
C. 575
D. 339
E. 601
F. 522
A. 594
C. 575
E. 601
400
Choose the expression that best identifies how the sum could be estimated by rounding to their nearest hundred.
359+135
400+100
400
The bike barn sold 42 bikes in August. In September they sold 27 bikes. What is the best estimate of how many bikes they sold in August and September?
About 70 bikes were sold in August and September.
500
If you plot the number 879 on the number line which hundred would it round to
It rounds to 900
500
Choose the expression that best identifies how the sum could be estimated by rounding to their nearest hundred.
461 + 225
500+200
500
Ms. Castellano's rounded a mystery number to the nearest ten and got 600. Ms. Leak rounded the same mystery number to the nearest hundred and got 600.
Could the mystery number be 592? Why or Why not?
No the mystery number could not be 592 because when you round that to the nearest 10 that number is not 600 it is 550.