how to use hundreds chart for % of the numbers are multiples of 2 and 5?
5 out of 10 columns are multiples of 2, so 50% of all numbers are multiples of 2
2 out of 10 columns are multiples of 5, so 20% of all numbers are multiples of 5.
The % of the numbers that are multiples of both 2 and 5 us 50% * 20% = 10%
To use a hundreds chart to determine the percentage of numbers that are multiples of 2 and 5, follow these steps:
1. Start by drawing or printing a hundreds chart, which is a 10x10 grid with numbers from 1 to 100.
2. Look for the numbers on the chart that are multiples of 2. Multiples of 2 are numbers that can be divided evenly by 2, which means there is no remainder when you divide the number by 2.
3. Shade or mark all the multiples of 2 on the chart. These numbers will be located in every other column because every second number is divisible by 2. For example, the numbers 2, 4, 6, 8, and so on are all multiples of 2.
4. Next, look for the numbers on the chart that are multiples of 5. Multiples of 5 are numbers that can be divided evenly by 5 with no remainder.
5. Shade or mark all the multiples of 5 on the chart. These numbers will be located in every fifth row because every fifth number is divisible by 5. For example, the numbers 5, 10, 15, 20, and so on are all multiples of 5.
6. Now, identify the numbers that are both multiples of 2 and 5, also known as multiples of 10. These numbers will be where the shaded columns and rows intersect.
7. Count the total number of shaded squares on the chart (representing multiples of 2 and 5). This will give you the count of numbers that are multiples of 2 and/or 5.
8. Finally, divide the count of multiples of 2 and/or 5 by 100 (the total number of squares on the chart) and multiply by 100 to get the percentage.
For example, if there are 12 shaded squares representing multiples of 2 and/or 5, the percentage would be (12/100) * 100 = 12%.