.What is answer pls help me with this very important question. 9 + 10 (78) =

Mathematics

2 answers:

Korolek [52]3 years ago

6 0

Answer:

789

Step-by-step explanation:

9+10(78)

9+10*78

9+780

789

Alik [6]3 years ago

5 0

What you would do is you would do is you would multiply 10 and 78 together. An easy way I found of doing this is by taking the zero off the ten and moving it to the 78. This works for all numbers like 10 100 10000 and so on. Now just add nine to the 780 and there’s your answer

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A compact disc player costs £50 plus 17 1/2% Vat. Calculate the total cost of the compact disc player

Shtirlitz [24]

With Calculator:
To work out the multiplier, take the percentage, divide by 100 and add 1
17.5% / 100 = 0.175
1 + 0.175 = 1.175
£50 x 1.175 = £58.75

Without Calculator:
First work out easy percentages of 50 (if needed use previous answers (such as 10) to work out smaller percentages (such as 5%))
100% = 50
10% = 5
5% = 2.5
2.5% = 1.25
10% + 5% + 2.5% = 17.5%
5 + 2.5 + 1.25 = £8.75
Add this on to the original price:
£50 + £8.75 = £58.75

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3 years ago

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