How to add even numbers - ACT Math
Card 0 of 3
Which of the following expressions is odd for any integers 
and 
?
Which of the following expressions is odd for any integers
The key here is for any integers 
and 
, that means that no matter what you set 
and 
equal to you will get an odd number. An odd number is not divisible by 2, also it is an even number plus and odd number. The only expression that satisfies this is 
. 
will always be even, so will 
, but 
is always odd so the combination gives us an odd number, always.
The key here is for any integers
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Evaluate: 
Evaluate:
For this problem, align and solve by adding the ones digit 
, tens digit 
, and hundreds digit 
. This also means that you have to add 
to the 
in the thousands place to get 
.
For this problem, align and solve by adding the ones digit
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Find the sum of 12 and 42.
Find the sum of 12 and 42.
Rewrite the question into a mathematical expression.
Add the ones digit.
Add the tens digit.
Combine the tens digit and the ones digit. The answer is 
.
Rewrite the question into a mathematical expression.
Add the ones digit.
Add the tens digit.
Combine the tens digit and the ones digit. The answer is
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