Key to the
Operation
Operation
What operation would you use if the problem asks to find the 'difference'?
Subtraction
Kevin is writing a book. He writes for 2 hours every for a week straight to finish it. How many hour did it take him to write his book?
It takes Kevin 14 hours to write his book.
Sammy has 35 toy cars. James and Veronica only have 28 toy cars. Sammy gives 12 cars to his mom. How many toy cars does Sammy have now?
Sammy has 23 toy cars.
4 + 3 x 12
4 + 3 x 12
4 + 36
40
Why are math books always so sad?
They have too many problems
What operation would you use if the problem says 'increase'?
Addition
Kevin has a new kitten. He buys a 3 new cat toys for $2.70 each. If Kevin only has a $10 bill, will he have enough money to buy the cat toys? If yes, how much change will he have leftover?
Yes, he will get $1.90 back in change.
Stephanie can walk her dog 4 km in 32 minutes. Her dog, Fluffy, weighs 12 kilograms. How long would it take her to walk her dog one km?
It takes her 8 minutes to walk one km.
92 - 9 x 5
92 - 9 x 5
81 - 9 x 5
81 - 45
36
How do you keep warm in a cold room?
You go to the corner because it's always 90 degrees!
What operation would you use if the problem asks you to 'double' ?
Multiplication
Kevin wants to share his 232 Pokemon cards with 3 of his best friends. How many cards will each person get?
Kevin and his friends will each have 58 Pokemon cards.
Dr. Banks had 330 toothbrushes to give away to his patients. He is a really nice dentist and all his patients really like him. Dr. Banks gave away 53 toothbrushes in January. He gave away 67 toothbrushes in February. In March he noticed that there are 70 green toothbrushes in the toothbrush drawer. How many toothbrushes does he have left?
Dr. Banks has 210 toothbrushes left.
(4+17) x (70-56)
(4+17) x (70-56)
21 x (70 - 56)
21 x 14
294
Why didn't the quarter roll down the hill with the dime?
Because it has more cents!
What operation would you use if the problem say to 'share'?
Division
Last week, Kevin spent $2.50 at the Dollarama, $27.35 at Loblaws and $8.10 at Petsmart.
This week, Kevin spent only $1.30 at Dollarama, $22.50 at Loblaws and $7 at Petsmart.
What was the difference in his spending from last week to this week?
The difference is $7.12!
Amy is attending an awards ceremony. Amy sits at a table with 8 other guests. There were 10 waiters on hand to serve dinner. There are 14 tables in the ceremony hall. How many guests are attending the ceremony?
There are 126 guests at the ceremony.
6 + 53 - 33 x 3
6 + 53 - 33 x 3
6 + 125 - 33 x 3
6 + 125 - 99
131 - 99
32
Why should you never ask an obtuse angle for advise?
Because they are never right
What operation would you use if the problem asks to 'combine' ?
Addition
Kevin is working at a pizza shop. On Friday evening the pizza shop had orders for 97 pepperoni, 4 vegetable, and 335 cheese pizzas. If Kevin and the 3 other cooks each made an equal number pizzas, how many pizzas did Kevin have to make?
Kevin had to make 109 pizzas!
There are 273 gumballs in the gumball machine. There is an equal number of each seven colours. The machine has space to hold 238 more gumballs. How many gumballs of each colour are in the machine?
There are 39 gumballs of each colour.
(4 x 8 - 6) + 4 x 12
(4 x 8 - 6) + 4 x 12
(32 - 6) + 4 x 12
26 + 4 x 12
26 + 48
74
Why do teenagers always travel in groups of three, five, or seven?
Because they just can’t even!!