Arithmetic Grade Six
Lesson Fifty-nine: X Problems
In this lesson X Problems will follow these rules:
- add going up
- multiply going down
Here's an X Problem before the slots have been filled:
Here is the same X Problem with the slots correctly filled.
Negative two plus negative three is negative five and so that sum goes into
the top slot. Negative two times negative three is positive six and so that
product goes in the bottom slot.
Remember the following rules for multiplying with signed numbers:
positive x positive = positive
positive x negative = negative
negative x positive = negative
negative x negative = positive
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