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4 cards from this section. Quick, good the night before a test.
What is the additive identity for rational numbers?
What number do you add to another number without changing it?
What happens when you multiply any rational number by 1?
Try recalling what multiplying by the identity does.
What represents the identity element for addition?
Consider which number keeps other numbers unchanged when added.
True or false: The product of any rational number and zero is the number itself.
Think about what happens when you multiply by zero.
Prove that 5 × 1 = 5 and 5 + 0 = 5 using examples of your choice. Choose two different rational numbers.
Consider rational numbers you've learned, like fractions.
If a rational number x is such that x + 0 = x, demonstrate the relationship using simple fractions.
Try with various rational numbers to see the consistency.
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