Question

activity 1
add and subtract the decimal numbers. round the answers to the tenths place.

1. 56.02 + 89.09
2. 99.63 - 89.87
3. 129.74 + 229.01
4. 506.06 - 317.12

activity 2
put the decimal numbers in order from least to greatest.

1. 0.1, 0.09, 0.19
2. 0.07, 0.005, 0.75
3. 1.23, 1.03, 0.031
4. 2.06, 2.6, 2.9
5. 0.09, 0.098, 0.089
6. 17.34, 17.04, 17.7

activity 3
answer the questions about data and statistics.

1. what type of graph would be the most helpful if you were interested in finding the upper quarter of the data?

(a) pie graph
(b) scatter plot
(c) box - and - whisker plot

1. what type of graph would be the most helpful if you were examining the relationship between date and temperature?

(a) pie graph
(b) scatter plot
(c) box - and - whisker plot

Explanation:

Activity 1

Question 1

Step1: Add the numbers

$56.02 + 89.09=145.11$

Step2: Round to tenths

Rounding $145.11$ to the tenths place gives $145.1$

Question 2

Step1: Subtract the numbers

$99.63−89.87 = 9.76$

Step2: Round to tenths

Rounding $9.76$ to the tenths place gives $9.8$

Question 3

Step1: Add the numbers

$129.74+229.01 = 358.75$

Step2: Round to tenths

Rounding $358.75$ to the tenths place gives $358.8$

Question 4

Step1: Subtract the numbers

$506.06−317.12=188.94$

Step2: Round to tenths

Rounding $188.94$ to the tenths place gives $188.9$

Activity 2

Question 1

Compare the decimals: $0.09<0.1<0.19$

Question 2

Compare the decimals: $0.005<0.07<0.75$

Question 3

Compare the decimals: $0.031<1.03<1.23$

Question 4

Compare the decimals: $2.06<2.6<2.9$

Question 5

Compare the decimals: $0.089<0.09<0.098$

Question 6

Compare the decimals: $17.04<17.34<17.7$

Activity 3

Question 1

A box - and - whisker plot shows the five - number summary (minimum, first quartile, median, third quartile, maximum). So it can be used to find the upper quarter (third quartile) of the data.

Question 2

A scatter plot is used to show the relationship between two variables. Date and temperature are two variables, so a scatter plot is the most helpful for examining their relationship.

Answer:

Activity 1

1. $145.1$
2. $9.8$
3. $358.8$
4. $188.9$

Activity 2

1. $0.09, 0.1, 0.19$
2. $0.005, 0.07, 0.75$
3. $0.031, 1.03, 1.23$
4. $2.06, 2.6, 2.9$
5. $0.089, 0.09, 0.098$
6. $17.04, 17.34, 17.7$

Activity 3

1. c. box - and - whisker plot
2. b. scatter plot