Review: Approximation, Decimal Conversion & Basic Operations

A cheetah covered 94.829km in one hour. Round off the distance covered to the nearest whole number.

• 94 km

• 95 km

• 96.8 km

• 90.9 km

The heights of three pupils in Year Five are 147.63cm, 150.04cm, and 132.07cm. What is the total height of the pupils?

• 312.54cm

• 610. 749cm

• 523. 54cm

• 429.74cm

When a number is rounded to the 3 decimal places (3d.p), it is also in the nearest ___

• tenths

• hundredths

• thousandths

• tens

Estimate 99.5 x 20.3 to the nearest whole number.

• 3000

• 4000

• 2000

• 1000

Express 1.75 as a fraction in its lowest terms

• 1 ½

• ¼

• 1 ¾

• 1 ¼

Jimmy’s desk is 0.9m high, and Jessica’s desk is 0.88m high, whose desk is higher, and by what height difference?

• Jimmy’s desk by 0.02 m

• Jessica’s desk by 1.54 m

• Jessica’s desk by 0.02 m

• Jimmy’s desk by 1.54 m

The children in a class were asked to change 24/100 to a decimal fraction. Uzo got 0.024, Ada got 24.00, Nkem got 0.24 and Obi got 2.4. Who got the answer right?

• Uzo

• Nkem

• Ada

• Obi

Snow fell in Newton twice in one day. The town received 12 ½ cm of snow in the morning and another 7 ¼ cm of snow in the afternoon. Write the amount of snow that fell in the afternoon in decimals.

• 12.5

• 7.25

• 15.20

• 19.75

When you round one of these numbers to the nearest tenths, you get 99.7. Which number is it?

• 99.791

• 99.735

• 99.754

• 99.820

 48.32kg of liquid cement was poured into 10 gallons each for distribution. What is the total quantity of cement to be distributed?

• 48.32kg

• 483.2kg

• 4832kg

• 4.832kg