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Question
primary 5 | Maths
| Whole Numbers
One Answer Below
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Pls help me with the method shown above
( I need help with q.6)
Date Posted: 5 years ago
Views: 255
For 1 to 99, there are 99 numbers.
1 - 9 : 9 single-digit numbers
Digits = 9 x 1 = 9
10-99 : 90 double-digit numbers
Digits = 90 x 2 = 180
Total = 9 + 180 = 189 digits
Now, for 1 to 200,
You already know the total for 1 to 99.
So you'll just have to to add the digits total for 100 - 200 to your 189 to get the answer.
100 - 200 : 101 three-digit numbers
Digits = 3 x 101 = 303
Total = 303 + 189 = 492 digits
1 - 9 : 9 single-digit numbers
Digits = 9 x 1 = 9
10-99 : 90 double-digit numbers
Digits = 90 x 2 = 180
Total = 9 + 180 = 189 digits
Now, for 1 to 200,
You already know the total for 1 to 99.
So you'll just have to to add the digits total for 100 - 200 to your 189 to get the answer.
100 - 200 : 101 three-digit numbers
Digits = 3 x 101 = 303
Total = 303 + 189 = 492 digits
Thanks
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I hope this helps you!
Date Posted:
5 years ago
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