JSS 1 Mathematics Flashcards: Estimating Length, Capacity, Mass, Age and Time

Question 1

A classroom door is most reasonably estimated to be about ________ high.

Accepted Answer

2 metres

Question 2

A common sachet of drinking water holds roughly ________.

Accepted Answer

50 centilitres

Question 3

For a household bucket, which capacity is the sensible estimate?

Accepted Answer

10 litres

Question 4

A full bag of rice sold in a market may have a mass of about ________.

Accepted Answer

50 kilograms

Question 5

An exercise book is more likely to have a mass near 200 ________.

Accepted Answer

grams

Question 6

For most JSS 1 learners, which is the best age estimate?

Accepted Answer

about 11–13 years

Question 7

A morning school assembly is most likely to last about ________.

Accepted Answer

20 minutes

Question 8

The distance from one end of a school football field to the other is roughly ________.

Accepted Answer

100 metres

Question 9

Using the width of your palm as a reference, a reasonable estimate is ________.

Accepted Answer

about 10 centimetres

Question 10

A pupil estimates a classroom desk to be 1 metre long. Why is this plausible?

Accepted Answer

A desk is close in length to a metre rule

Question 11

Before measuring a corridor exactly, what is the best way to make a useful estimate?

Accepted Answer

Compare it with a known length or count regular paces

Question 12

A pupil says a chalkboard is about 4 cm long. Which correction is sensible?

Accepted Answer

It is closer to 4 m long

Question 13

Walking 5 km is more likely to take ________ than 5 minutes.

Accepted Answer

about 1 hour

Question 14

Choose the most reasonable mass for one orange.

Accepted Answer

about 200 g

Question 15

The capacity of a teaspoon is best estimated as ________.

Accepted Answer

about 5 mL

Question 16

Approximately how many 1-litre bottles would fill a 20-litre container?

Accepted Answer

20 bottles

Question 17

A teacher is 31 and a learner is 12. To the nearest ten years, their age difference is about ________.

Accepted Answer

20 years

Question 18

A foot length of 25 cm is used to estimate a mat. Eight foot-lengths suggest a mat length of about ________.

Accepted Answer

2 metres

Question 19

Why might two pupils give slightly different estimates for the same table?

Accepted Answer

Their reference lengths or judgements may differ

Question 20

A tap fills a 10-litre bucket in about 2 minutes. At the same rate, estimate the time for 5 such buckets.

Accepted Answer

about 10 minutes

Strong work.