Addition
1/3 + 1/2=
what is 5/6
2/6+3/6=
1/2 - 1/10=
2/5
5/10-1/10=4/10
1/8 (1/2)=
1/16
multiply across numerators to get 1, multiply across denominators to get 16
-10 divided by 2
-5
26-8(2)=
10
26-16=
3/5 + 8/3=
3 4/15
9/15+40/15=
3 + (-4)=
-1
3 positives, 4 negatives= 3 zero pairs 1 negative leftover
2 1/3 (4 1/2)=
10 1/2
7/3(9/2) multiply numerator by numerator and denominator times denominator and then simplify to a mixed number
1/5 ÷ 5/6
6/25
4+2-5+6-8(1/2)
3
8(1/2)=4 and then we go left to right
2.56 + 3.4
5.96
2.56
3.40
line up decimal and add
-14.5 - 3.75=
-18.25
rewrite as plus a negative and then add them up, lining up the decimals and the answer is negative
2.2(1.5)(-3.4)
-11.22
don't line up decimals, multiply as if they are whole numbers and move decimal after. Take it one step at a time 2.2(1.5)= 3.30 and then multiply that number by 3.4 and answer is negative because a -(+)=-
99 ÷ l -33 l =
absolute value of -33
3
1/4+3/8
1-2/5
numerator= 1/4+3/8
denominator= 1-2/5
1 1/24
numerator= 5/8 divided by denominator= 3/5
mult by reciprocal= 5/8(5/3)
-1.45 + -2.723
-4.173
line up decimals and add, answer is negative because they would both be on the negative side of the chipboard
2 1/6 - 4 1/3=
-2 1/6
13/6 - 26/6= -13/6
1/6(9/4)(6)(4/9)
1
1/6(6/1)=1
9/4(4/9)=1
1(1)=1
multiplication is commutative, we can rearrange the terms and get the same answer
-24÷ .3=
80
Mariana is baking cookies. She started with 2 cups of flour and added in 2 and a half cups of sugar and 1.25 cups of chocolate chips and a cup of peanut butter chips. But then she realized that was too much sugar and she had to take out 3/4 of a cup. If the recipe makes 12 cookies, how many cookies per total cups is that?
2 cookies per total cups
6 3/4 total - 3/4 cup of sugar
12 cookies/6 cups=2 cookies/1cup
When BillyBob when to bed the temperature was -12.4 degrees. Over the course of the morning it warmed up by 17.7 degrees, what is the new current temperature?
5.3
-12.4+17.7=
crossing 0 into the positives going right on the number line
Lindsey has a gift card with $45.67 on it, she spends $4.99 on a hair clip and $13.25 on makeup. How much is left on the gift card?
$27.43
add up the hair clip and makeup by lining up decimals and then subtract that amount from the starting value
A class is trying to raise funds for a field trip, they are selling candy bars. Snickers cost $1.30 and Twix cost $1.70. How much money has been raised if they sold 52 Twix and 64 Snickers?
$171.60
1.30(64)= snickers $
1.70(52)= twix $
Add up candies to get the total
A farmer is looking to create plots in his vegetable garden. The whole garden has an area of 94.78 sq ft and each of his veggies will require 6.77 sq ft to grow. How many different plots can the farmer mark off?
14 plots
14(6.77) = 94.78
[3+(-3+7)(7-3)+5]÷ 22+4=
10
parentheses first, then multiply, [3+16+5]=24
After the bracket, exponent 22=4
24÷ 4=6 + 4= 10