Area
Name the three units of measure we use for Area.
What is cm2 , m2 , km2 ?
What is the formula for perimeter of a rectangle?
Area = 2 x ( L + B )
or
L + B + L + B
What unit will you use to measure the length of your hose?
metres
What unit is volume and Capacity measured in?
litres , millitres, cm3 , m3
Convert 465 mm to cm
divide by 10
= 46.5cm
What is the formula for finding area of a square?
What is:
Area = S x S or S2
Calculate the length of a side of a square field of perimeter 36metres.
S = P divide by 4
S= 36 divide by 4
= 9metres
How many pieces of string each measuring 8 cm can be cut from a length measuring 264cm?
264 divide by 8
= 33 pieces of string
How many litres are there in 300 mL ?
DIVIDE BY 1000
0.3 L
How many mL are there in 3L ?
1000 X 3
= 3000mL
Calculate the length of a side of a square whose area is 49 cm2
Side = square root of 49
= 7
If the distance around a rectangular field is 84 metres and with a length of 30 metres, calculate the width of the field.
First find width = P divide by 2
= 84 divide by 2
= 42
then, subtract the length = 42 - 30
= 12 m
A piece of ribbon of length 180 cm was cut off from a length measuring 2m 10cm. What is the remaining length of ribbon ?
convert all to centimetres
1m = 100 cm
2m 10cm = 210
210 - 180
= 30cm
How many litres are there in 1250 mL ?
divide by 1000
1.25 L
Convert 0.8 L to mL
multiply by 1000
= 800mL
Find the area of a field with all equal sides and the length of one side is 32cm.
What is
Area = S x S
= 32 x 32
= 1,024cm2
Find the cost of fencing a rectangular field with the dimensions 30 m and 40 m, with wire that is sold at $6.00 per metre.
p = ( L + B ) x 2
( 40 + 30 ) x 2 = 70 x 2
140 m
140 x 6 = $840. 00
What must be added to 70 cm to make it 1.3 m?
convert to centimetres
1.3m x 100 = 130cm
= 130 - 70
= 60 cm
Sadie purchased 2 bottles of hand sanitizer. One bottle contains 2500 mL of liquid content. How many litres of hand sanitizer does Sadie have?
1 bottle = 2500mL
2bottles = 2500 x 2
= 5000 mL
convert to Litres divide 5000 by 1000
Sadie has 5L of hand sanitizer
Convert 4. 6 km to m
multiply by 1000
= 4600m
What is the area of a rectangle that measures 128 cm long and 15 cm wide ?
Convert your answer to m2.
What is : Area = L x B
= 128 x 15
= 1 920 cm2
1920 divide by 100
= 19.20 m2
Daddy walked 3 times around a rectangular field 60metre long and 53 metres wide. Calculate the distance he walked.
P = ( L + W) x 2
= ( 60 + 53 ) x 2 = 113 x 2
= 226m
226 x 3 = 678m
The length of a piece of ribbon is 5m 80cm. What is the Total length of 6 pieces of ribbon of similar length?
convert to centimetres
5.80 x 100 = 580cm
580 x 6 = 3 480 cm
3480 divide by 100 = 34m 80cm or 34. 8m
Lunch boxes are stacked neatly in a basket, by looking at them Jaydon can see there are 13 faces and 4 rows. If each box has a volume of 8m3 , calculate the volume in the basket.
no. of boxes = 13 x 4
= 52 boxes
volume = 52 x 8
= 416m3
Jason ran 2.3 km
Jaydon ran 877 m
What is the difference in the distance they ran ?
convert 2.3 to m multiply by 1000
= 2300 m
= 2300 - 877
= 1 423m
OR = 1. 423 km