Addition vs. Subtraction
A Word Problem says "How many in all" vs " How many" which is addition and which is subtraction?
How many in all = Addition
How many more = Subtraction
Mr. K is in a Mr. Beast video. Mr. Beast gives him 10,000 dollars.
Mr. K trips, falls, and loses 8,230 dollars.
Question:
What is the difference between the money Mr. Beast gave him and the money he has now?
Answer:
10,000 − 8,230 = 1,770 dollars
So, Mr. K has 1,770 dollars left.
A man gives his son 223 Robux for Christmas. The son spends 173 Robux on a skin of 67.
Question:
How much did the son’s money decrease after the purchases?
A man gives his son 223 Robux for Christmas. The son spends 173 Robux on a skin of 67.
Question:
How much did the son’s money decrease after the purchases?
223 − 173 = 50
There were 445 non-fiction books but 83 went missing and 45 were transferred to another library. How many non-fiction books are left?
Start with 445 books.
First, 83 went missing:
445 − 83 = 362
Then 45 were transferred to another library:
362 − 45 = 317
Carlos had 520 stickers. He gave away 185 stickers to his friends. How many stickers does Carlos have left?
Carlos had 520 stickers. He gave away 185 stickers to his friends. How many stickers does Carlos have left?
Answer:
A man has 432 takis, while another man has 350 takis. How many do they have combined?
A man has 432 takis, while another man has 350 takis. How many do they have combined?
Answer:
There are 2,475 books in total in the library. 592 books are on loan and 137 books are missing. Out of the 592 books, 74 books are late. How many books are there in the library?
2,475 – 592 – 137 = 1,746 There are 1,746 books in the library.
A farmer had 860 apples. He took away 347 apples to sell at the market. How many apples are still on the farm?
A farmer had 860 apples. He took away 347 apples to sell at the market. How many apples are still on the farm?
Liam has 605 baseball cards. Mia has 378 cards. How many fewer than Liam does Mia have?
605
- 378
------
227
The next food item she has to prepare is soup. She needs 280 cups of mushroom soup. If the first team made 90 cups in 60 minutes, and the third team made 70 cups in 90 minutes, how any cups should the second team prepare in order to meet the required amount of soup
The next food item she has to prepare is soup. She needs 280 cups of mushroom soup. If the first team made 90 cups in 60 minutes, and the third team made 70 cups in 90 minutes, how any cups should the second team prepare in order to meet the required amount of soup
First, 90 + 70 = 160; then, 280 – 160 = 120 The second team needs to prepare 120 cups of soup.
A man runs into a store looking for La-Bubus for his daughter. He grabs the one his daughter wanted him to buy, but the price has increased to 1,000 dollars. Yesterday it was 423 dollars.
Word Problem
A man runs into a store looking for La-Bubus for his daughter. He grabs the one his daughter brought, but the price has increased to 1,000 dollars. Yesterday it was 423 dollars.
Question:
What is the difference between yesterday’s price and today’s price?
Answer:
1,000 − 423 = 577 dollars
So, the price increased by 577 dollars.
Question:
What is the difference between yesterday’s price and today’s price?
A library had 841 books. 579 books were borrowed. How many books remain in the library?
A library had 841 books. 579 books were borrowed. How many books remain in the library?
Answer (with borrowing):
A Mr.K wants to be the Kool-Aid Man. They run through 4 walls: 2 red walls and 2 blue walls.
The first red wall costs 452 dollars.
The second red wall costs 243 dollars.
Each blue wall costs 243 dollars.
Questions:
How much do both red walls cost in total?
How much more does a red wall cost than a blue wall?
How much do all 4 walls cost in total?
The Kool-Aid Man says he will fix one of the blue walls for free. How much will the total price decrease?
Questions:
How much do both red walls cost in total?
How much more does a red wall cost than a blue wall?
How much do all 4 walls cost in total?
The Kool-Aid Man says he will fix one of the blue walls for free. How much will the total price decrease?
Solutions:
Both red walls total cost: 452 + 243 = 695
Red wall costs more than a blue wall: 452 – 243 = 209
Total cost of all 4 walls: 695 + 486 = 1,181
Price decrease if one blue wall is free: 243
A library has 1,250 books, and a school library has 975 books. How many more books does the first library have than the second?
A library has 1,250 books, and a school library has 975 books. How many more books does the first library have than the second?
Answer:
Ella has 478 stickers, and her friend Ben has 367 stickers. How many stickers do they have in total?
Ella has 478 stickers, and her friend Ben has 367 stickers. How many stickers do they have in total?
Answer: