bounds

1. The length of a fence is 137 metres, correct to the nearest metre. Choose the upper and lower bound for the length of the fence.

• 136.5 m

• 141m

• 137.5m

• 132m

Zoe’s weight is 62 kg, correct to the nearest kilogram. Anu’s weight is 85 kg, correct to the nearest kilogram.

(a) Write down the upper bound for the weight of Zoe.

(b) Write down the lower bound for the weight of Anu.

• a) 61.5 kg

• a) 62.5 kg

• b) 84.5 kg

• b) 85.5 kg

y = 1.8 correct to 1 decimal place.

Calculate the lower bound for the value of 4y + 1.

• 10.2

• 6.2

• 8

Write down the upper bound for the length of AB & BC

• AB = 19.5

• AB = 15

• BC = 8.25

• BC= 8.35

Glass A contains 122 millilitres of water, correct to the nearest millilitre. Glass B contains 168 millilitres of water, correct to the nearest millilitre.

Calculate the upper bound of the difference, in millilitres, between the volume of water in glass A and the volume of water in glass B.

• 46

• 47

An athlete runs 400 metres, correct to the nearest metre. The athlete takes 50.2 seconds, correct to the nearest 0.1 of a second.

Work out the upper bound of the athlete’s average speed.

Give your answer correct to 3 significant figures

Some cases have to be lifted by the crane. Each case has a mass of 68 kg , correct to 2 significant figures.

Write down the upper bound of the mass of a case.

the weight of a potatoes is 25 kg correct to the nearest kG /write down the smallest possible weight of the of bag /and also in largest

• smallest24.5/largest25.5

• smallest23.6/largest29.5

• smallest24.5/largest25.5kg

• kjjnejneqovmqeo

Tags

CCSS.7.EE.B.3

each of the numbers below has been rounded to the degree of accuracy shown in the brackets of the number 2.9

• 2.85 ≤ 2.9<2.95

• 2.71≤ 2.4 ≤ 2.35

• 2.8≤ 2.8≤ 2.66

• gwregwg

find the upper and lower bounds in each case 121(nearest hole number)

• ,hvouiewmkgi

• 111≤121<131

• 120.5≤121<121.5

• 120≤121<122