Calculate each sum: a. 1+2+3+4+5+6+7+8 b. 2+3+4+5+6+7+8+9 c. 3+4+5+6+7+8+9+10 d. 4+5+6+7+8+9+10+11 e. 5+6+7+8+9+10+11+12 f. Discuss the pattern in these sums.

Use the basic addition fact table for whole numbers shown and discuss with your group given of the following questions.

a. How does the table illustrate the closure property?
b. How does the table illustrate the commutative property?
c. How does the table illustrate the identity property?
d. How do the addition properties help students learn their basic facts?

Find i.

$$A \cap B$$

ii.

$$A \cup B$$

for: a. A = {6, 7, 9, 11, 12} and B = {5, 8, 10, 13, 9} b. A = {1, 2, 3, 4} and B = {5, 6, 7, 8} c. A = {1, 3, 5, 7} and B = {1, 2, 3, 4, 5, 6, 7, 8, 9}

Employ the stem-and-leaf plot or dot plot to list the actual data entries. What is maximum data entry? What is the minimum data entry?

Is honey a cough remedy? Refer to the Archives of Pediatrics and Adolescent Medicine (December 2007) study of honey as a remedy for coughing. The coughing improvement scores (as determined by the children's parents) for the patients in the over-the-counter cough medicine dosage (DM) group, honey dosage group, and control group are reproduced in the accompanying table.

$$\begin{array}{lrrrrrrrrrrrrrr} \hline \text { Honey } & 12 & 11 & 15 & 11 & 10 & 13 & 10 & 4 & 15 & 16 & 9 & & \\ \text { Dosage: } & 14 & 10 & 6 & 10 & 8 & 11 & 12 & 12 & 8 & & & & \\ & 12 & 9 & 11 & 15 & 10 & 15 & 9 & 13 & 8 & 12 & 10 & & \\ & 8 & 9 & 5 & 12 & & & & & & & & \\ \hline \text { DM Dosage: } & 4 & 6 & 9 & 4 & 7 & 7 & 7 & 9 & 12 & 10 & 11 & & \\ & 3 & 4 & 9 & 12 & 7 & 6 & 8 & 12 & 12 & 4 & 12 & & \\ & 13 & 7 & 10 & 13 & 9 & 4 & 4 & 10 & 15 & 9 & & & \\ \hline \text { No Dosage } & 5 & 8 & 6 & 1 & 0 & 8 & 12 & 8 & 7 & 7 & 1 & 6 & \\ \text { (Control): } & 7 & 7 & 12 & 7 & 9 & 7 & 9 & 5 & 11 & 9 & 5 & & \\ & 6 & 8 & 8 & 6 & 7 & 10 & 9 & 4 & 8 & 7 & 3 & 1 & 4 & 3 \end{array}$$

Find the standard deviation of the improvement scores for the honey dosage group.

Dimostrare o confutare che se a | bc, dove a, b e c sono numeri interi positivi e a ≠ 0, allora a | b o a | c.

Solve the inequality and give your answer using interval notation.

$$5(3-x)>3 x-1$$

What was the Crittenden Compromise?

Write a word problem that corresponds to given of the following models for subtraction.
a. Take-away
b. Number line
c. Comparison
d. Missing addend

For the stem-and-leaf plot below, what are the maximum and minimum entries?

Work with a partner to solve the problem: Jack collects postage stamps. He sold 7 of his stamps and had 29 stamps left. Draw a Bar diagram. Suppose Jack sold 15 stamps and had 21 stamps left. How would the bar diagram change?

A set of 25 cards is randomly placed face down on a table. 15 cards have only the letter A written on the face, and 10 cards have only the letter B. Patrick turned over 1 card. What are the odds of this card having the letter B written on its face?

Solve, using two equations in two variables. A grocer mixes together sone cashews costing $8 per kilogram with some Brazil nuts costing$ 10 per kilogran. The grocer sold 12 kg of the mixture for $ 8.50 per kilogram. How many kilograms of cashews were in the mixture the grocer sold?

The numbers 1 through 52 are written on individual cards and placed face down. If you draw one of the cards, what is the probability that it will have a number less than 13 on it? Explain how you arrived at your answer.