Ummmmm this did not help at all! never using this again!
To get 80 using four number 5s, you can use the following mathematical expression: (5 x 5) + (5 x 5) + (5 - 5) = 80. This equation breaks down to 25 + 25 + 0 = 80. By multiplying two fives to get 25 twice and subtracting 5 from 5 to get 0, you can achieve a total of 80.
21 5s
One possibility is 55 + 5*5 = 55 + 25 = 80
(5+5+5) x5 +5 =80. Cancels to: (15) x5 +5 =80 75 +5 =80 80=80
4x5=20 20x4=80 come on I'm in yr7 and i knew that straight away
In the Rb atom, the electron configuration is [Kr]5s^1. This means there is 1 electron in the 5s sublevel of the Rb atom.
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