unit 4 avcn

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UNIT 4
SAFETY RULES
Cardinal number
Calculations
gives instructions
calculates himseft
4
5.1 Read out these sums. Give the answers:
(a) 13.13 + 60.17 = 73.3
(b) 40.02 – 20.02 = 20
(c) 18.18  9 = 2.02
(d) 70 x 4 = 280
 70 times 4 is 280
 13.13 plus 60.17 is 73.3
 40.02 minus 20.02 is 20
 18.18 divided by 9 is 2.02
4
5.2 Read out these problems. Solve them:
(a) Multiply 98.4 by 5 and divide the answer by 12.

(b) Add 33.5 to 26.35 and subtract 45.8 from the answer.
 33.5 + 26.35 = ?
? – 45.8 = ?
98.4 x 5 = ?
?  12 = ?
5.2 Read out these problems. Solve them:
(a) Multiply 98.4 by 5 and divide the answer by 12.

(b) Add 33.5 to 26.35 and subtract 45.8 from the answer.
 33.5 + 26.35 = 59.85
59.85 – 45.8 = 14.05
98.4 x 5 = 492
492  12 = 41
5.3 how do we calculate these? Make instructions:
+ Multiply 2 by 3
2 x 3 = 6
Divide 21 by 6
21 : 6 = 3.5
The length of the box is 3,5 m

+ Divide 21 by 3
21 : 3 = 7
Divide 7 by 2
7 : 3 = 3.5
The length of the box is 3,5 m
Add 4 to 10
4 + 10 = 14
The height of the house is 14 m
Subtract 10 from 15
15 - 10 = 5
The height of the tank is 5 m
Multiply 0.1 by 0.5 the multiply the answer by 0.25
(0.1 x 0.5) x 0.25 = 0.0125
The volume of the draw is 0.0125 m3
The end
Thank you!