Given the limitations of the calculator, ask pupils to give as many different possible decimals to the number "0.27823728282" which is displayed on a calculator screen. e.g 0.27823728282828282..., 0.27823728281999999, 0.2782372828248392,

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6 Questions

Q1.

Using a calculator, calculate the simplified fraction of $$196 \over 190$$.

Correct answer: $$98 \over 95$$

$$96 \over 90$$

$$62 \over 60$$

$$16 \over 15$$

Q2.

Using a calculator, work out the answer to $${16 \over 15} \times {30 \over 32}$$.

$$480 \over 320$$

Correct answer: 1

Q3.

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?

Correct Answer: EXE, exe, execute

Q4.

Using a calculator, match the decimal to the equivalent fraction.

Correct Answer:0.35,$$7 \over 20$$

$$7 \over 20$$

Correct Answer:0.894,$$447 \over 500$$

$$447 \over 500$$

Correct Answer:2.134,$$1067 \over 500$$

$$1067 \over 500$$

Correct Answer:2.413,$$2413 \over 1000$$

$$2413 \over 1000$$

Q5.

The format key on the Casio fx-991CW allows you to change between decimals, improper fractions and mixed numbers.

Correct answer: True

False

Q6.

Using your calculator, find the answer to $${21 \over 12} \times {2 \over 3}$$

1.16666

Correct answer: 1.166666667

1.1666666666666666666667

1.166666666666666666666666666666

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6 Questions

Q1.

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

Correct answer: -9 as the calculator follows the priority of operations

-9 as this is the correct answer

Q2.

Working with fractions is always more accurate than using decimals.

True

Correct answer: False

Q3.

The calculator displays the decimal 1.234567891. Which of the following could this decimal be?

Correct answer: $$1.\dot{2}3456789\dot{1}$$

Correct answer: $$1.234567891\dot{4}$$

Correct answer: $$1.23456789\dot{1}$$

$$1.\dot{2}323456789\dot{1}$$

Q4.

Use your calculator to find the area of

Correct answer: $$5 \over 12$$ m$$^2$$

$$0.416$$ m$$^2$$

$$0.4166666667$$ m$$^2$$

$$16 \over 15$$ m$$^2$$

Q5.

Use your calculator to covert 0.6252 into a fraction. The numerator will be

Correct Answer: 1563

Q6.

Use your calculator to covert 0.0625 into a fraction. The denominator will be

Correct Answer: 16