Vocab
PEMDAS is the same thing as ___________.
inverse multiplication, order of operations, compatible numbers, distributive property
Order of Operations
Estimate to the nearest hundred 287.50 + 184.25 + 95=
=600
300+200+100=600
2.8 + (-8.7)=
-5.9
12(4-2)-6=
=18
12(2)-6
24-6=18
What is the Grinch's dogs name?
Max
What does PEMDAS stand for?
Parenthesis
exponents
multiplication
division
add
subtract
Estimate 39(4) + 27(6) + 12 (-4)=
Round 39, 27, and 12 to the nearest tens place
=300
40(4) + 30(6) + 10(-4)
160 + 180 -40= 300
-15-(-7)=
-8
1/3 (18) + 18 + (3 + 18/2)=
=36
6 + 18 + (3 + 9)=
6+18+12= 36
What kind of houses are popular to make and decorate?
Gingerbread Houses
Numbers that are close to the given numbers that make estimation or mental math easier.
inverse multiplication, order of operations, compatible numbers, distributive property
compatible numbers
Estimate to the nearest tens place
47 + 36 +42 + 29+ 39 + 49 +44 + 32=
=320
50+40+40+30+40+50+40+30=
(84 divided by -4)
-21
152 (1/4) divided by 15/4=
Round to whole number
10
In the song “Frosty the Snowman,” what made Frosty come to life?
hat
(specifically an old silk hat)
Property that states to multiply out the parenthesis first (it is in the alphabet in this room)
inverse multiplication, order of operations, compatible numbers, distributive property
Distributive Property
Estimate 210 divided by 5.2 X 9 3/4 + (-205)=
=200
200 divided by 5 X 10 -200=
1.9 (-.04)=
-.076
JT ran a 100 meter race. He runs at an average speed of 8.1 meters/second. How long does it take him to run a 100 meter race?
Round to the nearest hundredth
(Hint: set up as an equivalent ratio)
=12.35
=12.3456
Round
What Christmas beverage is also known as “milk punch?”
Eggnog
Multiplying by the reciprocal will get an answer of 1
(Example: 3/2 times 2/3)
inverse multiplication, order of operations, compatible numbers, distributive property
inverse multiplication
Estimate 21 X 37 X 21/5 divided by 98
20 X 40 X 4 divided by 100
-2 1/2 divided by 3/4= OR
-2.5 divided by .75=
KCF if you do the fraction version
-3 1/3
-3.33 repeating
15 patties weigh 1/4 pound. The store sells 1 pound for $3.66. How much will it cost for his 15 patties rounded to the nearest cent?
=$13.73
15(1/4)(3.66)=13.725
Round
What cartoon character’s name is used to indicate a small, thin, or just plain undesirable Christmas tree?
Charlie Brown