Topic 2: How to Solve

16 - 5 x 2

• subtract first

• multiply first

(6 - 3) - 3 x 2

• subtract 6 - 3 first

• multiply 3 x 2 first

• subtracting 3 - 3 first

Create a number line using the integers between -5 and +5.

• write a number line that has only -5 and +5 on it

• write a number line that has -5, 0, and +5 on it

• write a number line that has each number between -5 and +5 on it

a)  Write the opposite integer of +4.  ______

b)  What is the sum of +4 and your answer from 6a?   ______

c)  Is this true of all integers and their opposites?  _______

• For question b, the answer is -4

• For question b, the answer is +4

• For question b, the answer is 0

5/10 - 3/10

• subtract the numerators

• subtract the denominators

• subtract the numerators, then reduce the difference

• subtract the denominators, the realize the new denominator is 0 and that cannot happen

(one tenth) 1/10 x 3

• Multiply 1 x 3, use the denominator 10

• Multipy 1 x 3, and 10 x 3, simplify

• Multiply 10 x 3, keep 1 as numerator

49.20 ÷ 2

• Long division. 2 on the inside of the sign, 49.2 on the outside

• Long division. 2 on the outside of the sign, 49.2 on the inside

• subtract

• add

Change 30% to a decimal

• 30% - just put a decimal instead of a percent sign

• percent - means per 100, so make a fraction 30/100

• percent means per 100, so 30/100, but then make into a decimal using the numerator and two decimal places

Change 4/5 to a ratio.

• Numerator : denominoatr

• Make a fraction out 100 first.

• Turn it into a decimal.

Find the outcomes possible when flipping two coins at the same time.

• Only heads and tails possible. 2 outcomes

• Heads and tails possible on each coin. 2 outcomes

• Heads and tails possible on each coin. 4 outcomes possible. (2 outcomes x 2 coins)