Solve your problems ...







New! - Multiplication game - catch the hodag!


Adding and subtracting with negatives activity


Factoring Game


All new Monster Math negative number game is now available at the Android store - iphone version coming soon. The city is being terrorized by the hideous hodag and it's up to you to scare it off ... start playing and you'll figure out how to do arithmetic with negatives in no time - the fun way - Check it out!



How to solve:
Problem:
3 + +5
3 + (-5)
3 - (+5)
3 - -5
-3 + (-5)
-3 - -5
If you see two signs next to each other, change them to a single sign:

++ changes to +
+- changes to -
-+ changes to -
-- changes to +
3 + 5
3 - 5
3 - 5
3 + 5
-3 - 5
-3 + 5
Now there are just two signs. (For example, 3-5 is really +3 - 5)

If the 2 signs are different, the answer has the sign of the larger number.
(5 in this case, since 5 is larger than 3.)

If they're the same, the answer also has the same sign.
+
-
-
+
-
+
If the signs are different, subtract the two numbers.
If they're the same, add.
8
2
2
8
8
2
Final Answer:
8
-2
-2
8
-8
2



Here's one to try:

      






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(Starts timer)
     




              





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