Rounding and Estimating

1 / 15

Round off 475 to the nearest 100.
1. 500
2. 400
3. 450
Round off 475 to the nearest 10.
1. 470
2. 480
Round of 447 to the nearest 100
1. 500
2. 400
Round off 2145 to the nearest 100.
1. 2100
2. 2200
Estimate 1.14 + 5.4 + 3.6 + 0.87
1. 10
2. 11
3. 12
Estimate .68 X 299.
1. 200
2. 100
3. 210
If there are on average 9 words in a line of a particular novel and 30 lines in a page, estimate the number of words in the 29 pages of this novel.
1. 2700
2. 270
3. 8100
Estimate (348 X 2.09) / 19.8
1. 150
2. 35
3. 350
The maximum loading in a lift is 300kgs. If there are 6 people in the lift and their weights are as follows: 34.5 Kg, 39.7 Kg, 24.8 Kg, 85 Kg, 56.2 Kg and 44 Kg. Estimate whether the lift is overloaded.
1. Yes
2. No
The weight of a piece of fruit is 245.653 by a very precise measuring scale, what is the weight of the piece of fruit to the nearest .01 of a gram?
1. 245.65
2. 24565
3. 245.66
The weight of sweets in a packet is 200grams to the nearest 10 grams. Which of the following could not be the actual weight of sweets in the packet?
1. 204
2. 197
3. 195
4. 215
The population of a local town is 8745, write this figure correct to 3 significant figures.
1. 7450
2. 8750
3. 8740
38 people are invited to a party and the host needs 1 cup, 2 plates, 1 knife, 1 fork, 1 spoon and a napkin for each person. Estimate which of the following the person hosting the party should buy.
1. 250 pieces of mixed cups, plates etc.
2. 280 pieces of mixed cups, plates etc.
3. 180 pieces of mixed cups, plates etc.
A rectangular solid is 19.5 cm wide, 24.9 cm long and 20.1 cm high, which of the following is the best estimate of the volume?
1. 1000
2. 100
3. 10000
Estimate the cost of inviting 200 people to a party if the cost per person is €24.99.
1. 1000
2. 4000
3. 5000

Rounding and Estimating

Draft 01 (c) Project Maths Development Team