Solve Equations
5 * 4 + 7 = g
g = 27
Write the equation and solve!
Rosa and Kate both went shopping. Kate bought a jacket for $45 and boots for $42. Rosa bought jeans for $27, a sweater for $22, and sneakers. They both spent the same exact amount of money. How much were Rosa's sneakers?
($45 + $42) - ($27 + $22) = s
s= 38
Tell whether this number is prime or composite and why!
99
Composite because it has more than 1 factor pair.
What are the first 5 multiples of 4?
4, 8, 12, 16, 20
4 * 1, 4 * 2, 4 * 3, 4 * 4, 4 * 5
Rule: multiple by 3
8, 24, 72, 216, ___
648
16 - (5 * 3) = m
m = 1
Solve. Then explain the meaning of the remainder.
Jessica needs to bake 50 muffins. Her baking pan holds 12 muffins. How many rounds of baking will she need to do?
50 div 12 = 4 R2
Jessica will need to do 5 rounds of baking.
Tell whether this number is prime or composite and why!
67
Prime, its only factor pair is 1 and 67
Write the first ten multiples of 8
8, 16, 24, 32, 40, 48, 56, 64, 72, 80
Rule: Add 8
27, 35, 43, 51, 59, __
67
(12 - 8) + (3 * 3) = p
p = 13
Write the equation and solve!
There are 5 fifth grade classes going on a field trip. 2 of the classes have 16 students each and 3 of the classes have 17 students each. They are traveling in vans that hold 9 students each. How many vans must they have to transport all the students?
(2 * 16 + 3 * 17) div 9 = v
v = 9 R2
They will need 10 vans.
Tell whether this number is prime or composite and why!
88
Is 54 a multiple of 6? Explain
Yes
6 * 9 = 54
First term: 6 Rule: add 40
6, 46, 86, 126, 166, 206, 246, 286, 326
(24 div 4) + 19 = t
t = 25
Write the equation and solve!
A movie theater has 13 screens. On weekends, each screen shows a movie 7 times in one day. On weekdays, each screen shows a movie 5 times in one day. How many more showings are there on a Saturday than on Tuesday?
(7 - 5) * 13 = m
m = 26
Tell whether this number is prime or composite and why!
53
Prime its only factor pair is 1 and 53
List the factors of 63
1, 3, 7, 9, 21, 63
Anne lives in the 10th house on Bell St. The first house on Bell St is numbered 4. The second house is 8. The third house is 12. The fourth house is 16. If this pattern continues what is Anne's house number likely to be?
48
6 * 11 + 7 * 9 + 10 * 15 = p
p = 279
Write the equation and solve!
Terrence has 24 model cars arranged in equal rows of 6 model cars. Natalie has 18 model cars arranged in equal rows of 3 model cars. How many rows of model cars in all do they have?
24 div 6 + 18 div 3 = r
r = 10
Tell whether this number is prime or composite and why!
18
Rule: skip count by 7
7, 14, 21, __, __, __, __, __, __, __
28, 35, 42, 49, 56, 63, 70
Use input/output machines to solve the table
input output
10 1
13 __
16 __
__ 13
25 __
output: 4, 7, 16
input: 22