Adding Rational Numbers
-6 + 10 = ?
4
-12 - 6 = ?
-18
2 x (-2) = ?
-4
8/2 as a whole number
4
What's the smallest continent?
Australia.
656 + (-478) = ?
178
3.80 - 1.26 = ?
2.54
5 x (-12) = ?
-60
3/5 as a decimal
0.6
What is the smallest city in the US?
Buford.
1/5 + -2/10 = ?
0
12 - (-15) = ?
27
-27 รท 3 = ?
-9
2/3 as a decimal
0.66 (repeating 6)
What's a baby spider called?
A spiderling.
66.77 + 50.74 = ?
117.51
4/6 - (-2/4) = ?
1 1/6
2/5 x 3/4 = ?
3/10
9/12 as a percent
75%
What is a flock of crows known as?
A murder.
Rules for adding integers
Step 1. Record the absolute value of each of the numbers.
Step 2. Subtract the smaller number from the larger number.
Step 3. Put the sign (negative or positive) of the number with the larger absolute value by the answer.
Rules for subtracting integers
Step 1. If the signs are the same, add the absolute value of each number.
Step 2. If the signs are different, subtract the absolute value of each number.
Step 3. If you are subtracting two negatives, your answer will be negative. If you are subtracting two positives, the answer will be positive.
Step 4. If you are subtracting a negative and a positive, then the sign of the number with the larger absolute value will be in the answer.
Rules for multiplying/dividing integers
Step 1. To multiply or divide integers, always multiply or divide the absolute values.
Step 2. The product of two positive integers or two negative integers is positive. The product of a positive integer and a negative integer is negative. It's the same with dividing.
18/99 as a decimal
0.18 (repeating 18)
What year was the toaster invented?
1919