Instructions A positive plus a negative is zero, and every zero is a positive and a negative. Manipulate the orbs to help you add positive and negative numbers. Goals Enter the sum in the Equals Box.


Instructions A positive plus a negative is zero, and every zero is a positive and a negative. Manipulate the orbs to help you add positive and negative numbers. Goals Enter the sum in the Equals Box.


Instructions A positive plus a negative is zero, and every zero is a positive and a negative. Manipulate the orbs to help you add positive and negative numbers. Goals Enter the sum in the Equals Box.


Instructions A positive plus a negative is zero, and every zero is a positive and a negative. Manipulate the orbs to help you add positive and negative numbers. Goals Enter the sum in the Equals Box.


Instructions A positive plus a negative is zero, and every zero is a positive and a negative. Manipulate the orbs to help you add positive and negative numbers. Goals Enter the sum in the Equals Box.


Instructions A positive plus a negative is zero, and every zero is a positive and a negative. Manipulate the orbs to help you add positive and negative numbers. Goals Enter the sum in the Equals Box.


Instructions A positive plus a negative is zero, and every zero is a positive and a negative. Manipulate the orbs to help you add positive and negative numbers. Goals Enter the sum in the Equals Box.


Instructions A positive plus a negative is zero, and every zero is a positive and a negative. Manipulate the orbs to help you add positive and negative numbers. Goals Enter the sum in the Equals Box.


Instructions When you take away something good, things get worse. When you take away something bad, things get better. Take away positives or negatives by throwing them in the dustbin. If you don't have enough to take away, create more by using your zeroes. Every zero is made from a positive and a negative. Goals Correct the difference in the Equals Box.


Instructions When you take away something good, things get worse. When you take away something bad, things get better. Take away positives or negatives by throwing them in the dustbin. If you don't have enough to take away, create more by using your zeroes. Every zero is made from a positive and a negative. Goals Correct the difference in the Equals Box.


Instructions When you take away something good, things get worse. When you take away something bad, things get better. Take away positives or negatives by throwing them in the dustbin. If you don't have enough to take away, create more by using your zeroes. Every zero is made from a positive and a negative. Goals Correct the difference in the Equals Box.


Instructions When you take away something good, things get worse. When you take away something bad, things get better. Take away positives or negatives by throwing them in the dustbin. If you don't have enough to take away, create more by using your zeroes. Every zero is made from a positive and a negative. Goals Correct the difference in the Equals Box.


Instructions When you take away something good, things get worse. When you take away something bad, things get better. Take away positives or negatives by throwing them in the dustbin. If you don't have enough to take away, create more by using your zeroes. Every zero is made from a positive and a negative. Goals Correct the difference in the Equals Box.


Instructions When you take away something good, things get worse. When you take away something bad, things get better. Take away positives or negatives by throwing them in the dustbin. If you don't have enough to take away, create more by using your zeroes. Every zero is made from a positive and a negative. Goals Correct the difference in the Equals Box.


Instructions When you take away something good, things get worse. When you take away something bad, things get better. Take away positives or negatives by throwing them in the dustbin. If you don't have enough to take away, create more by using your zeroes. Every zero is made from a positive and a negative. Goals Correct the difference in the Equals Box.


Instructions When you take away something good, things get worse. When you take away something bad, things get better. Take away positives or negatives by throwing them in the dustbin. If you don't have enough to take away, create more by using your zeroes. Every zero is made from a positive and a negative. Goals Correct the difference in the Equals Box.


Instructions When you take away something good, things get worse. When you take away something bad, things get better. Take away positives or negatives by throwing them in the dustbin. If you don't have enough to take away, create more by using your zeroes. Every zero is made from a positive and a negative. Goals Correct the difference in the Equals Box.


Goals Answer all questions
Submit your answers
 Positive five plus negative three equals:
(+5) + (3) =
Negative six plus positive four equals:
(6) + (+4) =
Positive five minus negative three equals:
(+5)  (3) =
Negative six minus positive four equals:
(6)  (+4) =
Protons are positive (+1), electrons are negative (1), and Neutrons are neutral (0).
If I had an atom with 3 protons, 4 neutrons, and 2 electrons, what would the overall charge be?
Protons are positive (+1), electrons are negative (1), and Neutrons are neutral (0).
If I had an atom with 12 protons, 6 neutrons, and 16 electrons, what would the overall charge be?
please write your comments so we can make this experience better.

Instructions You have completed the lesson. You may scroll up to review the lesson. 