Ch. 5 Prior knowledge

• Wiskunde
• Middelbare school
• havo
• Leerjaar 1

Decimals

Look at page 182 to 188

What is the objective for today?

Point or comma?

Dutch system

5,4

1.000.000

GB 

5.4

1,000,000

Additions with decimals

Calculate:
40 + 0,7 + 0,04

1. 40,74
2. 41,1
3. 40.74
4. 41.1

Calculate:
43,4 - 1,6

1. 42,8
2. 45
3. 43,6
4. 41,8

Calculate:
What exercise leads to 7,2

1. 3,8 + 2,5 + 1,1
2. 10 - 3,8
3. 8 - 1,2 + 0,4
4. 9 - 2,3 - 0, 3

Multiplications with decimals

Calculate:
3,4 x 0,7

1. 2,38
2. 23,8
3. 21,9
4. 2,19

Calculate:

8 x 9,3

1. 74,3
2. 74,7
3. 74,4
4. 73,4

Calculate:

12,9 x 1,32

1. 13,48
2. 17,028
3. 15,298
4. 18,238

What question leads to 0,9

1. 72 / 0,8 = ...
2. 5,4 / 6 = ...
3. 0,1 / 10 = ....
4. 810 / 9 = ....

0,5

0,32

0,6

0,125 x 4

0,8 x 0,4

12,3 - 11,7

Rounding

Round 1,28328 to 2 decimal places

1. 1,28
2. 1,283
3. 1,3
4. 1,29

Round 1,85438 to 1 decimal place

1. 1,85
2. 1,86
3. 1,8
4. 1,9

Round to 3 decimal places:

14, 284459

1. 14,28
2. 14,284
3. 14,285
4. 14,29

Can you start with your work?

Yes, I understand it!

No, I need extra help

Homework

Do ex. 3, 8, 11, 14, 16 of chapter 5

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