Estimating, chance events, and open number sentences
Expanded Notation
Extra
100
n+45=190
What is n?
n=145
100
60 x (10s)=
600
100
Make a magnitude estimate for 25 x 37
10s 100s 1,00s 10,000s
100s
100
Write 567 in expanded notation
500+60+7
100
round to the nearest thousand
20,503
21,000
200
3,341+799=
4,140
200
Write : 5 x 5 x 5 x 7 in exponential notation.
5^3 x 7
200
What is the chance of 10% chance of rain?
very unlikely
200
Write 1,785,453 in expanded notation
1,000,000+ 700,000+ 80,000+5,000+400+50+3
200
round to the nearest tenth
38.27
38.3
300
306.85+26.96=
333.81
300
46 x 97=
4,462
300
Write an open number sentence for the problem then solve.
Remember you need a variable and units.
Gabby walked 2 miles to Ellie's house. Then both girls walked 2 miles to Ali's house. Gabby took 28 minutes to get to Ellie's and the girls took 45 minutes to get to Ali's. How much longer did it take to get to Ali's then Ellie's?
45-28= m
m = 17 minutes
300
Write 142.5 in expanded notation
100+40+2+ 5 x 0.1
300
John had the following scores on his test: 72, 82, 88, 63, 76, 91, 82 ,96
List and label the maximum, minimum, range, mode, and median.
Max-96
min-63
range-33
mode-82
median- 82
400
128.07-85.25=
42.82
400
2.4 x 63=
151.2
400
Brent earned $48 dollars mowing lawns. With the money he earned he bought 2 cd's that cost a total of $23. How much money did he have left?
48-32= m
m= 16 dollars left.
400
Write 5,675.46 in expanded notation
5,000+600+70+5+ (4 x 0.1) +(6 x 0.01)
400
1 inch = 600 miles how much does 3.5 inches equal?
2,100 miles
500
Sam's guinea pig is 5 years old and 10.25 inches long. Monica's guinea pig is 2 years old and 11.5 inches. Blake's guinea pig is 4 years old and 9.3 inches long. What is the differences in length between the shortest and longest guinea pig?
11.5-9.3= 2.2 inches
500
3.58 x 2.1=
7.518
500
Luke was making breakfast for friends. He had 4 glasses of milk and 9 plates. He started with 19 eggs. He bought one dozen more eggs. How many eggs did he have to cook?
19+12= e
e = 31 eggs.
500
Write 98.7542 in expanded notation
90+8+(7 x 0.1) + (5 x 0.01) + (4 x 0.001) + (2 x 0.0001)
500
I walked 1,600 feet to the store or ________ inches.