Expressions
The total of sixteen and "n"
16 + n
z - 11 < 16
z < 27
y - 45 = 74
y = 119
Manny has $15.75 in nickels and pennies. If he has 770 pennies, how many nickels does he have?
770 + 5n = 1575
or 1575 = 770 + 5n
n = 16
Manny has 161 nickels
The product of eleven and "p" is one hundred thirty two
11p = 132
Forty-two less than a number "x"
x - 42
6c < 42
c < 7
x + 57 = 149
x = 92
Andy has $27 in his bank account. He has an after-school job where he earns $2 per hour. How many hours will he have to work to have a total of $61 dollars in his bank account?
1) How many hours he must work
2) Yes, there are enough facts
3) No, there are no extra facts
4) Multiplication, addition
5) 2h + 27 = 61
h = 17
Andy needs to work 17 hours
Sixty-eight is less than eighty
68 < 80
Twice a number "y" less eight equals seventy-four.
2y - 8 = 74
s dvb 7 > 8
56
4t = 144
t = 36
Kaylyn spends a total of $20.55 on stamps. She bought 35 thirteen cent stamps, and the rest were twenty cent stamps. How many twenty cent stamps did she buy?
1) How many stamps she bought
2) Yes, there are enough facts
3) No, there are no extra facts
4) Multiplication, addition
5) 20n + (35 x 13) = 2055
n = 80
Kaylyn bought 80 stamps
11t >= 154
t >= 14
The value in cents of "k" dimes
10k
a + 9 > 20
a > 11
4m + 59 = 159
m = 25
Fifteen-year-old Lily is three years older than twice the age of her sister Nathalie. Their sister Aaliyah, is two years younger than twice Nathalie's age. How old are Nathalie and Aaliyah?
1) How old are Nathalie and Aaliyah
2) Yes, there are enough facts
3) No, there are no unnecessary facts
4) Multiplication, addition
5) 2n + 3 = 15
n = 6, Nathalie is 6 years old
a = 2(6) - 2 = 10, Aaliyah is 10 years old
s dvb 2=< 5
s =< 10
One is more than "m"
1 > m
2t + 6 < 12
t < 3
5y - 1 = 19
y = 4
Gerardo and Leo spent a total of $23.75 on cookies. They bought fifteen snickerdoodles costing 75c each. The remainder of the money was spent on oatmeal cookies costing 50c each. How many cookies did Gerardo and Leo buy?
1) How many cookies were bought
2) Yes, there are enough facts
3) No, there are no unnecessary facts
4) Multiplication, addition
5) 50c + (75 x 15) = 2375
c = 25
Gerardo and Leo bought 25 cookies
Provide an explanation for why multiplication and addition are commutative.
a + b = b + a
a x b = b x a