Solution:
3.45 + 12.01 + 3.3 = 18.76
Therefore, 3.45 + 12.01 + 3.3 = 18.76.
Question 2
A field is planted with Cabbages in rows. Each row contains 33 cabbage seeds and there are 49 rows. How many cabbage seeds are there in the field?
Solution:
Number of cabbage seeds in each row = 33
Number of rows = 49
Total number of cabbage seeds = 33 x 49 = 1617
Therefore, there are 1617 cabbage seeds in the field.
Question 3
There are 10 millimetres in a centimetre and 100 centimetres in a metre. How many millimetres are there in 35.1 metres?
Solution:
1 metre = 100 centimetres = 1000 millimetres
35.1 metres = 35.1 x 1000 = 35100 millimetres
Therefore, there are 35100 millimetres in 35.1 metres.
Question 4
Write down the next two numbers in the sequence.
(a) 7, 8, 10, 13, ………, ……….
(b) 106, 100, 93, 87, ………, ……….
Solution:
(a) 7, 8, 10, 13, 17, 22
Explanation:
8 – 7 = 1,
10 – 8 = 2,
13 – 10 = 3,
17 – 13 = 4,
22 – 17 = 5
(b) 106, 100, 93, 87, 82, 78
Explanation:
100 – 106 = -6,
93 – 100 = -7,
87 – 93 = -6,
82 – 87 = -5,
78 – 82 = -4
Therefore, the next two numbers in the sequence are 17 and 22 for (a) and 82 and 78 for (b).
Question 5
Look at the diagram.
Find the size of angle y.
Solution:
Other interior angle is 180° – 120° and 180° – 85°.
Sum of all angles in the triangle is 180°.
60° + y + 95° = 180°
y + 155° = 180°
y = 180° – 155°
y = 25°
Therefore, The value of angle y is 25°
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