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AQA GCSE Mathematics
1. Number
1.3 Measures and Accuracy
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Cards (147)
The unit for measuring volume is the
liter
To convert 5 meters to feet, multiply 5 m by
3.28
How many fluid ounces are in 200 milliliters?
6.8 fl oz
The metric system uses the
meter
as the standard unit for length.
How many pounds are in 8 kilograms?
17.6 lb
1 gram is approximately 0.035
ounces
.
True
What is the equivalent of 1 kilogram in pounds?
2.2 pounds
1 milliliter is equal to
0.034
fluid ounces.
When estimating, it's helpful to
visualize
common measurements like 1 meter or 1 kilogram.
To improve the accuracy of measurements, one should use more
precise
instruments.
How many feet are in 5 meters?
16.4 feet
Estimating measurements is important for making quick and reasonable
judgments
Using benchmarks like a standard door height of
2
meters helps in estimation.
Match the technique with its example:
Compare to Known References ↔️ Estimating table height by comparing to waist height
Visualize Common Measurements ↔️ Estimating room length by picturing meter sticks
Use Benchmarks ↔️ Estimating bookshelf height by comparing to a door
Round to Convenient Units ↔️ Estimating someone's height as 1.8 meters
What is one factor that affects the accuracy of a measurement?
Precision of instrument
What is a method to reduce the impact of random errors in measurements?
Take multiple measurements
Main rules for determining the number of significant figures
1️⃣ Non-zero digits are always significant
2️⃣ Zeros between non-zero digits are significant
3️⃣ Leading zeros are not significant
4️⃣ Trailing zeros in a number with a decimal point are significant
The measurement 3.450 has
4
significant figures.
The unit for measuring length is the
meter
Match the metric unit with its imperial equivalent:
1 meter ↔️ 3.28 feet
1 kilogram ↔️ 2.2 pounds
1 liter ↔️ 0.26 gallons
1 centimeter ↔️ 0.39 inches
1 liter is equivalent to 0.26
gallons
.
True
Match the metric unit with its imperial equivalent:
1 meter ↔️ 3.28 feet
1 kilogram ↔️ 2.2 pounds
1 liter ↔️ 0.26 gallons
1 centimeter ↔️ 0.39 inches
How many feet are in 5 meters?
16.4 ft
To convert 200 milliliters to fluid ounces, multiply 200 mL by
0.034
1 centimeter is equal to
0.39
inches.
How many gallons are in 1 liter?
0.26 gallons
What are some examples of known references to use for estimating measurements?
Hand span or foot length
What is the definition of accuracy in measurements?
Closeness to the true value
What is the standard unit for measuring length?
Meter
The square meter (m²) is used to measure area.
True
Comparing an object to known
references
is a key step in estimating measurements.
True
What is an example of a common measurement that can be visualized for estimation purposes?
1 meter
What are the four key techniques used in estimating measurements?
Compare, visualize, benchmark, round
Accuracy refers to how close a measurement is to the true or correct
value
Using digital tools over analog tools increases measurement precision.
True
Significant figures provide information about the precision and
accuracy
Which type of zeros in a number are considered significant?
Zeros between non-zero digits
How many significant figures does the measurement 10,000 have if there is no decimal point?
1 or 4
Steps to round a measurement to significant figures
1️⃣ Identify the number of significant figures required
2️⃣ Look at the digit after the last significant figure
3️⃣ Round up if the digit is 5 or greater
4️⃣ Round down if the digit is 4 or less
Why is it important to round measurements to the appropriate number of significant figures?
To communicate precision
See all 147 cards
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