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: Perform addition

$56.02 + 89.09=145.11$

• Step2: Round to tenths

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

Question 2

• Step1: Perform subtraction

$99.63−89.87 = 9.76$

• Step2: Round to tenths

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

Question 3

• Step1: Perform addition

$129.74+229.01 = 358.75$

• Step2: Round to tenths

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

Question 4

• Step1: Perform subtraction

$506.06−317.12=188.94$

• Step2: Round to tenths

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

Activity 2

Question 1

Comparing the decimals $0.09<0.1<0.19$

Question 2

Comparing the decimals $0.005<0.07<0.75$

Question 3

Comparing the decimals $0.031<1.03<1.23$

Question 4

Comparing the decimals $2.06<2.6<2.9$

Question 5

Comparing the decimals $0.089<0.09<0.098$

Question 6

Comparing the decimals $17.04<17.34<17.7$

Activity 3

Question 1

• Brief Explanation: A box - and - whisker plot shows the five - number summary of a data set (minimum, first quartile, median, third quartile, maximum). So it can be used to find the upper quartile (third quartile).
• Answer: c. box - and - whisker plot

Question 2

• Brief Explanation: A scatter plot is used to show the relationship between two variables. Here, date and temperature are two variables.
• Answer: b. scatter plot

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