Revision

Metric Convertions

100

100cm = 1______

metre

200

1000m = 1_______

Kilometre

300

1.75 litres = ______ml

1750

400

1 litre of water weighs 1kg. How much does 750ml of water weigh?

750g

500

1 metric tonne is 1,000kg. How many grams are in 0.8 metric tonnes?

800,000

Scale

100

I have a 50m plank of wood. I have another plank of wood twice the length. How big is my second plank of wood?

100m

200

A marathon is (roughly) 42km. How long is a half marathon?

21km

300

A pizza dough recipe calls for 5kg of flour and 2.75l water. It makes enough dough for 20 pizzas. 

How much flour is needed to make 2 pizzas?

0.5kg (or 500g)

400

I have 40m of fabric. I only need 2/5 of it. How much fabric do I need?

16m

500

A square has sides of 1cm and area of 1cm². What is the area of a square whose sides are twice as long?

4cm²

Units

100

What unit is length measured in?

cm/m/km

200

What unit is weight measured in?

mg/g/kg

300

What unit is volume measured in?

ml/litres

400

What unit is area measured in?

cm²/m²/km²

500

What does a lightyear measure?

Distance (9.46 trillion kilometres)

Substitution

100

If x=3 find the value of 3x+2

11

200

If x=-5 what is the value of 3x?

-15

300

If x=2 what is the value of x²+3x+1?

11

400

If x=10 what is the value of 3xy+y²

30y+y²

500

If x=-2 what is the value of 2x²+2x+3

7

Rounding

100

What is 10.4 rounded to the nearest whole number?

10

200

What is 382 rounded to the nearest 10?

380

300

What is 462,521 rounded to the nearest 100?

462,500

400

What is 999,999.9 rounded to the nearest whole number?

1,000,000

500

What is 86.999 rounded to the nearest hundredth?

87