Choose the statement that correctly describes the equation below.
725 + 289 = 724 + 290
ⒶThe equation is true, because if a take one from one addend, I must add one to the other addend.
ⒷThe equation is false, because if a take one from one addend, I must add one to the other addend.
ⒸThe equation is true, because if a take one from one addend, I must take one from the other addend.
ⒹThe equation is false, because if a take one from one addend, I must take one from the other addend.
A
Manny buys 5 gallons of ice cream. Each gallon of ice cream costs $5. Manny has a coupon for $2 off each gallon of ice cream.
a. (5 x 5) - 2
b. (5 x 5) + 2
c. 5 x (5 - 2)
d. 5 x (5 + 2)
B
Rick had $8. Then he worked for 4 hours making $12 an hour.
a. 8 + (4 + 12)
b. 8 + (4 x 12)
c. (8 + 4) + 12
d. (8 + 4) - 12
B
39 - 5 = n -2
What is n?
36
Trina said that she can solve math problems in her head without showing work. Select all of Trina’s correct statements.
a. 2 x 12 = 4 x 6 is true because 2 times 2 is 4 and 12 divided by 2 is 6.
b. 27 + 30 = 40 + 17 is true because 40 is 13 more than 27 and 17 is 13 less than 30.
c. 48 – 4 = 50 -2 is true because 48 plus 2 is 50, and 4 minus 2 is 2.
d. 75 + 38 = 73 + 39 is false because 73 is 2 less than 75 but 39 is not 2 more than 38.
e. 64 - 8 = 60-4 is true because 64 is 4 more than 60 and 4 is 4 more than 8.
A, B, D