Limitations of technology in calculations | Maths | Quizalize & Oak National Academy

Starter quiz

Using a calculator, calculate the simplified fraction of $196 \over 190$ .
- $98 \over 95$ ✓
- $96 \over 90$
- $62 \over 60$
- $16 \over 15$
Using a calculator, work out the answer to ${16 \over 15} \times {30 \over 32}$ .
- $480 \over 320$
- 4
- 2
- 1 ✓
Izzy's calculator gives an answer as a fraction. What is the name of the key that should be pressed last on the Casio fx-991CW in order to convert this fraction to a decimal?
- 'EXE' ✓
Using a calculator, match the decimal to the equivalent fraction.
- 0.35
  
  ⇔
  
  $7 \over 20$ ✓
- 0.894
  
  ⇔
  
  $447 \over 500$ ✓
- 2.134
  
  ⇔
  
  $1067 \over 500$ ✓
- 2.413
  
  ⇔
  
  $2413 \over 1000$ ✓
The format key on the Casio fx-991CW allows you to change between decimals, improper fractions and mixed numbers.
- True ✓
- False
Using your calculator, find the answer to ${21 \over 12} \times {2 \over 3}$
- 1.16666
- 1.166666667 ✓
- 1.1666666666666666666667
- 1.166666666666666666666666666666

Jacob uses his calculator to evaluate $-3^2$ . What will the calculator display as the answer?
- 9 as this is the correct answer
- 9 as the calculator ignores the priority of operations
- -9 as the calculator follows the priority of operations ✓
- -9 as this is the correct answer
Working with fractions is always more accurate than using decimals.
- True
- False ✓
The calculator displays the decimal 1.234567891. Which of the following could this decimal be?
- $1.\dot{2}3456789\dot{1}$ ✓
- $1.234567891\dot{4}$ ✓
- $1.23456789\dot{1}$ ✓
- $1.\dot{2}323456789\dot{1}$
Use your calculator to find the area of
- $5 \over 12$ m $^2$ ✓
- $0.416$ m $^2$
- $0.4166666667$ m $^2$
- $16 \over 15$ m $^2$
Use your calculator to covert 0.6252 into a fraction. The numerator will be ______
- '1563' ✓
Use your calculator to covert 0.0625 into a fraction. The denominator will be ______
- '16' ✓

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Incorrect inputting of negative numbers and/or exponents.

Encourage the use of brackets when using exponents.

Recurring decimals - A recurring decimal is one that has an infinite number of digits after the decimal point