A box of cereal has the following measurements: length = 16.5 cm; width = 4 cm; height = 30.25 cm. What is the volume of the cer
2 answers:
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Hey there,
So, we need to remember that the circumference of a circle is
3.14
So this means that we would do 500×3.14.
And by this we do. .
Firstly, work out 4 × 500. As mentioned before, we can ignore the decimal point for now. The smaller figures in green are the tens figures carried over. Working from right to left:
4 × 0 = 0
4 × 0 = 0
4 × 5 = 20
<span>Put the 0 in the appropriate column and carry the 2.
</span>
We now work out 10 × 500.
This can be written as 1 × 500 × 10.
Because we are multiplying by 10, we place 1 zero to the right and then work out 1 × 500.
1 × 0 = 0
1 × 0 = 0
<span>1 × 5 = 5
</span>
Lastly, work out 300 × 500.
This can be written as 3 × 500 × 100.
Because we are multiplying by 100, we place 2 zeroes to the right and then work out 3 × 500.
3 × 0 = 0
3 × 0 = 0
3 × 5 = 15
<span>
Put the 5 in the appropriate column and carry the 1
</span>Finally the 3 rows are added together starting at the right. The smaller figures in green are the tens figures carried over.
0 + 0 + 0 = 0
0 + 0 + 0 = 0
0 + 0 + 0 = 0
0 + 5 + 2 = 7
5 = 5
1 = 1
How is the decimal point positioned? 3.14 has 2 digits after the decimal point.
The final answer must also have 2 digits after the decimal point.
<span>So: 500 × 3.14 = </span>
~Jurgen
So, we need to remember that the circumference of a circle is
So this means that we would do 500×3.14.
And by this we do. .
Firstly, work out 4 × 500. As mentioned before, we can ignore the decimal point for now. The smaller figures in green are the tens figures carried over. Working from right to left:
4 × 0 = 0
4 × 0 = 0
4 × 5 = 20
<span>Put the 0 in the appropriate column and carry the 2.
</span>
We now work out 10 × 500.
This can be written as 1 × 500 × 10.
Because we are multiplying by 10, we place 1 zero to the right and then work out 1 × 500.
1 × 0 = 0
1 × 0 = 0
<span>1 × 5 = 5
</span>
Lastly, work out 300 × 500.
This can be written as 3 × 500 × 100.
Because we are multiplying by 100, we place 2 zeroes to the right and then work out 3 × 500.
3 × 0 = 0
3 × 0 = 0
3 × 5 = 15
<span>
Put the 5 in the appropriate column and carry the 1
</span>Finally the 3 rows are added together starting at the right. The smaller figures in green are the tens figures carried over.
0 + 0 + 0 = 0
0 + 0 + 0 = 0
0 + 0 + 0 = 0
0 + 5 + 2 = 7
5 = 5
1 = 1
How is the decimal point positioned? 3.14 has 2 digits after the decimal point.
The final answer must also have 2 digits after the decimal point.
<span>So: 500 × 3.14 = </span>
~Jurgen