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Q: Why is it that when you multiply by nine the numerals in the answer add up to nine?

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Six and three.

3x-3

When you multiply a one- digit number by nine, then add up the digits, it does equal nine. 9x1= 9 9x2= 18 1+8=9 9x3= 27 2+7= 9 9x4= 36 3+6= 9 9x5= 45 4+5=9 ETC. also, for the number you are multiplying by, the product's first digit will be one less than the number

60

no if you look at the multiplication table youll see that its not and try multiply up to a hundred by nine or add nine many times until you get up to 100 youll see it will not equal a hundred

Multiply the number of hours by 3600, and the number of minutes by 60. Then add everything up.

1500

36

I think that's the other way around. -2 and -5 multiply to 10 and add up to -7.

-13

-14 and -14 Add them together to get -28 Multiply them to get 196

340

15

341

They could be 6 Roman numerals that add up to DC = 600

That is written as A/(4+9) = 5. The first step would be to multiply both sides by the denominator, which is 13 (when you add four plus nine). You will then come up with A=65, which is the final answer.

-121

624

35

23

241

1

-51

33

-22