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Question
primary 5 | Maths
| Decimals
2 Answers Below
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Pls help me
Date Posted: 3 years ago
Views: 558
you may be reluctance to learn formula. Take a look at the pattern/trend
figure 1. 2+2
figure 2. 2 +2+2
figure 3. 2+2+2+2
figure 4. 2+2+2+2+2
how about figure 9? how many 2 are you going to add together? Is it 10? the number is 2*10 = 20
How about figure N? It is (N+1)
Number of dots will be 2*(N+1) or 2N +2.
The more similar sums you do, the more familar you will be. If you prefer to remember formula. No problem also.
figure 1. 2+2
figure 2. 2 +2+2
figure 3. 2+2+2+2
figure 4. 2+2+2+2+2
how about figure 9? how many 2 are you going to add together? Is it 10? the number is 2*10 = 20
How about figure N? It is (N+1)
Number of dots will be 2*(N+1) or 2N +2.
The more similar sums you do, the more familar you will be. If you prefer to remember formula. No problem also.
See 2 Answers
Basically each pattern is adding one more square but minus 2 dots since they are connected. So add 2 after each pattern.
So formula
= 4*n - (n-1)*2
= 2n + 2
So answer is 35 which will give 72 dots
So formula
= 4*n - (n-1)*2
= 2n + 2
So answer is 35 which will give 72 dots
Thank you
done
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Hope this helps
Date Posted:
3 years ago
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