Rounding
What is 26 mL rounded to the nearest ten? (1c)
30 mL
34 cm + 46 cm =
(5a)
80 cm
436 m - 178 m =
(11a)
258 m
Estimate by using compatible numbers.
63 + 21 + 44
(4a)
60 + 20 + 40 = 120
What is 137 rounded to the nearest ten? (2a)
140
651 m + 190 m =
(5b)
841 m
800 lb - 691 lb =
(11b)
109 lb
Estimate by using compatible numbers.
578 - 137 =
(4b)
600 - 100 = 500
or
580 - 140 = 440
What is 1,863 rounded to the nearest ten? (2b)
1,860
247 km + 329 km =
(5c)
576 km
A scientist has 341 mL of a mixture in a beaker. She poured out 153 mL of the mixture from the beaker. How many milliliters are still in the beaker? Solve. (5c)
188 mL
Jonah practiced the trombone for a total of 175 minutes during the first week of the summer. He practices for 235 minutes the second week. Estimate the total by rounding to the nearest ten minutes. (7a)
420 minutes
What is 2,147 rounded to the nearest hundred? (3a)
2,100
238 lb + 387 lb =
(6b)
625 lb
A cook buys a total of 316 fluid ounces of cooking oil. The cook buys 1 large and 1 small container. The large container holds 239 fluid ounces. How many fluid ounces are actually in the small container? (12b)
77 fl oz
Jonah practiced the trombone for a total of 175 minutes during the first week of the summer. He practices for 235 minutes the second week. Estimate the total by rounding to the nearest hundred minutes. (7b)
400 minutes
What is 18,551 rounded to the nearest hundred? (3b)
18,600
608 L + 392 L =
(6c)
1,000 L
The total length of a sign is 506 cm. Jillian paints it in 3 sections. The first 2 sections are 178 cm long altogether. How long is the third section? (10)
328 cm
A horse weighs 603 pounds more than its rider. The rider weighs 159 lb. How much do the horse and rider weigh together? (8c)
921 lb
A scientist has 341 mL of a mixture in a beaker. She poured out 153 mL of the mixture from the beaker. How many milliliters are still in the beaker? Estimate. (9a)
100 mL or 190 mL