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Q: How can you use the product 10 x 42 420 to find the product of 5 x 42?

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you would take the answer 420 and split in half

That's easy, just half it. 420 divided by 2 (5 is half of 10) which equals 210. (1) To check my answer, I did... 42 x5 (5 x 2=10 (carry the one), then 5 x 4=20 + 1= 120) ---- 210

LCM- using 14 12 and 10 is 420

divisors of 10 are 1,2,5 and 10, so highest number that can be divide 10 is 10,10 is also a factor of 420 Hence 10 is the highest common factor of 10 and 420. least multiplier of 420 is 420, also 420 is multiplier of 10 hence LCM is 420

420

420

1 |- 420

10% of 420 is 42.

420

It is: 420-10 = 410

You add as many zeros to the number as you have in the power of 10.

420

420.

69

There are 10 millimetres in one centimetre. Therefore, 420 millimetres is equal to 420/10 = 42 centimetres.

42 x 10 = 420

420

With a calculator this can be done by doing 420*1.11.Without a calculator, it is also very easy, and is done by finding 10% of 420 which is 420/10 which is 42. So 42 = 10% of 420. And 1% of 420 is 4.2. 1%+10%+100% = 4.2+42+420 =466.2.466.2Very basic.:)

42 is 10% of 420.

15 is half again as much as 10, so the new product would similarly increase by 50%.

h 10 or 9005 bulb

420-42 = 378

42

It is: 57*10 = 570.

600/420 = 10/7