What is the main purpose of using the CALCULATOR ?

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What is the main purpose of using the CALCULATOR ?

Task 1:

John orders Chips and Cola for himself and 6 friends.

Prices: Chips € 2 and Cola € 1.65

How to calculate the total cost?

John orders Chips and Cola for himself and 6 friends.

Prices: Chips € 2 and Cola € 1.65

How to calculate the total cost?

A

cost = 2 + 1.65 x 7

B

(2 + 1.65) x 7 = cost

C

7 x (2 +1.65) = cost

D

cost = (7 + 1.65) x 2

Task 2:

Calculate, using your calculator:

a. 13.5 + 9.2 x 8.3 =

Calculate, using your calculator:

a. 13.5 + 9.2 x 8.3 =

A

89.68

B

89.86

C

98.86

D

98.68

Task 3:

Calculate, using your calculator.

6.1 x (3.7 - 5.4) =

Calculate, using your calculator.

6.1 x (3.7 - 5.4) =

A

13.07

B

10,37

C

-10.37

D

-13.07

Task 4:

6.5 x 8.2 + 4.8 : 8 =

6.5 x 8.2 + 4.8 : 8 =

A

35,9

B

95.3

C

39,5

D

53.9

Task 5:

Write as decimal numbers, using your calculator.

Round to 3 decimal numbers.

Write as decimal numbers, using your calculator.

Round to 3 decimal numbers.

4228

A

0.667

B

0,667

C

0.666

D

0,666

Task 6:

Do the same with:

6

Do the same with:

6

97

A

7.668

B

6.887

C

6.778

D

8.667

Task 7:

Do the same with:

39

Do the same with:

39

5147

A

93.922

B

39,922

C

92.229

D

39.922

Task 8:

Calculate and round to whole numbers:

8842 x

Calculate and round to whole numbers:

8842 x

135

A

3400

B

3401

C

340.1

D

34.1

Task 9:

Solve and round the following equation on paper:

17 + 16x = 40

Round your answer to 3 decimal places.

Finally choose the right answer!

Solve and round the following equation on paper:

17 + 16x = 40

Round your answer to 3 decimal places.

Finally choose the right answer!

A

1.44

B

1.438

C

1,44

D

14.4

Task 10:

Solve the following equation on paper:

-9v + 19 = 32

Round your answer to three decimal places.

Use this sign, which means 'is approximately equal to':

Finally choose the right answer!

Solve the following equation on paper:

-9v + 19 = 32

Round your answer to three decimal places.

Use this sign, which means 'is approximately equal to':

Finally choose the right answer!

≈

A

1.44

B

-1.444

C

-1.445

D

1,444

Extra BASIC:

Task 11:

Calculate, using your calculator:

0.5 + (4.6 + 12.4 ) : 34 =

Task 11:

Calculate, using your calculator:

0.5 + (4.6 + 12.4 ) : 34 =

A

2

B

1

C

0

D

3

Etra Basic:

Task 12:

Calculate:

(24.9 - 12.5) x 8.8 - 10.4 =

Task 12:

Calculate:

(24.9 - 12.5) x 8.8 - 10.4 =

A

89.72

B

98,72

C

98.72

D

97.72

Task 13:

Which numbers(s) cannot be written as a decimal number that has exactly the same meaning?

Which numbers(s) cannot be written as a decimal number that has exactly the same meaning?

41

32

65

54

A

2/3
only

B

1/4
and
5/6

C

5/6
and
4/5

D

2/3
and
5/6

Task 14: Extra Basic: Calculate and round to 2 decimal places:

477 x

477 x

74

A

272,57

B

227.57

C

272.57

D

227.571

Task 15:

Solve this equation on paper.

Use the card method.

Round your answer to 3 decimal places.

Finally choose the right answer.

47c - 38 = -7

Solve this equation on paper.

Use the card method.

Round your answer to 3 decimal places.

Finally choose the right answer.

47c - 38 = -7

A

0.660

B

0.661

C

0.659

D

0,660

CHALLENGE:

Task 16:

Make an equation for the following information:

27 Players of a football club will be taken to their match.

5 Of them always travel with their coach in his car.

There is room for 3 players in each of the cars of the parents.

Call the number of parents n.

Which of the following equations is correct?

Task 16:

Make an equation for the following information:

27 Players of a football club will be taken to their match.

5 Of them always travel with their coach in his car.

There is room for 3 players in each of the cars of the parents.

Call the number of parents n.

Which of the following equations is correct?

A

27 = 4n + 5

B

5n + 3 = 27

C

5 + 3n = 27

D

27 = 5n + 3

CHALLENGE:

Task 17:

Solve the equation from the previous slide:

5 + 3n = 27

So: calculate n, the number of parents.

This number has to be rounded sensibly!

Task 17:

Solve the equation from the previous slide:

5 + 3n = 27

So: calculate n, the number of parents.

This number has to be rounded sensibly!

A

n = 7.333

B

n = 7

C

n = 7 .3

D

n = 8

Extra Basic

Task 18:

Solve this equation on paper.

Round your answer to 3 decimal places.

Finally choose the right answer.

2388 = 2000x + 387

Task 18:

Solve this equation on paper.

Round your answer to 3 decimal places.

Finally choose the right answer.

2388 = 2000x + 387

A

1.0005

B

1,002

C

1.001

D

-1.001

Extra Basic:

Task 19:

Solve this equation on paper.

Finally key in the answer, rounded to 3 decimal places:

123 = 23e - 3

Task 19:

Solve this equation on paper.

Finally key in the answer, rounded to 3 decimal places:

123 = 23e - 3

A

5.47

B

5.48

C

5,48

D

5.478

CHALLENGE:

Task 20:

In 2008 a world record was set for the fastest journey around the world in a speed boat. It lasted 1663.82 hours.

Calculate this in days, hours and minutes. Round to whole minutes.

Task 20:

In 2008 a world record was set for the fastest journey around the world in a speed boat. It lasted 1663.82 hours.

Calculate this in days, hours and minutes. Round to whole minutes.

A

99,829.2 minutes

B

69 days, 7 hours and 49 minutes

C

69 days, 7 hours and 53 minutes

D

69 days, 7 hours and 54 minutes