Grade 3 Math Expressions - Unit 5

Vocabulary

100

An ______ is a mathematical sentence with an equal sign.

What is an equation?

200

The _____ is the answer when adding two or more addends. 

What is a sum?

300

One of the numbers to be added is called an _______.

What is an addend?

400

A problem that involves putting together (combining, joining) groups of things to form a total. 

What is a put-together problem?

500

A problem that involves separating a group of objects.

What is a take apart problem?

Hidden Info

100

Amani bought a dozen eggs at the market. He gave 5 of them to Rocco. How many eggs does Amani have left?

Write an equation and solve the problem.

What is 12-5; 7 eggs?

200

Ashley is going on vacation for 3 weeks and 4 days. How many days will she be on vacation?

Write an equation and solve the problem.

What is (3x7) + 4; 25 days?

300

Jamaiyah went to Alaska for 4 months of the year in 2017. How many months was she NOT in Alaska?

Write an equation and solve the problem.

What is 12-4; 8 months?

400

Mrs. Howe bought 32 cat boots and put them in her home. Today she put boots on 3 of her cats. How many cat boots are still at home?

Write an equation and solve the problem. 

What is 32 - (3x4); 20 cat boots?

500

Victor had 4 quarters and 1 dime. Then he found 3 nickels and 14 pennies. What is the value of coins, in cents, that he has now?

Write an equation and solve the problem.

What is (4x25) + (1x10) + (3x5) + (14x1); 139 cents?

Extra Info

100

Dhrasti answered 12 reading questions and solved 9 math problems. Her brother answered 8 reading questions. How many reading questions did they answer in all?

Write an equation and solve the problem.

What is 12+8; 20 reading questions?

200

AJ had 8 jackets and 12 pairs of socks. Today his mom gave him 3 more jackets and another pair of socks. How many jackets does he have now?

Write an equation and solve the problem.

What is 8+3; 11 jackets?

300

Sienna had some roses in a bouquet. From her garden, she picked 9 more roses and 10 daisies. Now she has 16 roses in all. How many roses did she have at first?

Write an equation and solve the problem.

What is 16-9; 7 roses?

400

Tony's parking lot had 185 red cars and 202 blue cars. Then 74 red cars left the lot. How many red cars are in his parking lot now?

Write an equation and solve the problem.

What is 185-74; 111 red cars?

500

Evelyn plants 25 flowering plants and 6 bushes. She plants 9 roses and the rest are tulips. Then she plants some more tulips. Now she has 18 tulips. How many more tulips does she plant?

Write an equation and solve the problem.

What is (25-9) + t = 18; 2 tulips?

Two-Step Problems

100

Sergio picks 110 apples. He picks 40 red apples and the rest are green. He sells 35 green apples. How many greens apples does he have now?

Write an equation and solve the problem.

What is (110-40) - 35; 35 green apples?

200

Jena puts 76 cans on a shelf. She puts an equal number of cans in each of 9 rows and puts 4 cans in the last row. How many cans does she put in each of the 9 rows?

Write an equation and solve the problem.

What is (76-4) /9; 7 cans?

300

Nathan and Sofia pick carrots. Nathan picks 90 carrots. How many more carrots does Sofia pick than Hunter? What information do you need to solve the problem? Write the necessary information and solve the problem. 

What is "you need to know how many carrots Sofia picks. Sofia picks 110 carrots. 20 more.

400

Mr. Almodovar makes 53 toy cars and gives 4 away. He puts the rest in 7 bags with an equal number in each bag. How many toy cars are in each bag?

Write an equation and solve the problem.

What is (53-4) / 7? 7 toy cars.

500

Julian arranges 45 chairs in a row. He puts an equal number in each of 5 rows and puts 5 chairs in the last row. How many chairs does he put in each of the 5 rows? Explain how to write an equation and solve the problem. 

What is "the unknown number is the number in each of the 5 rows, which sounds like a multiplication equation. Then you have 5 more chairs, which is an addition equation. Write the equation: 5 x c + 5 = 45. Subtract the 5 from the last row. Think 5 x c = 40. What number multiplied by 5 is 40? 8. 8 chairs.

Misc. Problems.

100

Gabriel's group has 90 granola bars for a bake sale. Orlando's group has 60 granola bars. Together they sell 112 granola bars at the bake sale. How many granola bars are left over?

Write an equation and solve the problem.

What is (90+60) - 112; 38 granola bars?

200

Audrey makes 18 birdhouses this month. She makes 5 fewer birdhouses than Vivian makes? How many birdhouses does Vivian make? Draw comparison bars to represent the problem.

See picture

300

During one week Ms. Kulbeda rides her bicycle 34 miles and Coach B. rides 8 miles less than Ms. Kulbeda. How many miles do they ride altogether that week?

Answer: 76 miles

Is the answer reasonable?

No, because 30 + (30 - 10) = 50 miles

400

Of the 140 people at the school, 80 people were playing in the gym. The others were playing the hallways. Then 10 more people started playing in the hallways. How many people are playing in the hallways now?

What is 70 people?

500

Mrs. Lomax had 468 marbles in her collection. Her mom gave her 72 more marbles. She gives some of them to her friend. She now has 448 marbles. How many does she decide to give to her friend? Explain how you can decide if your answer is reasonable. 

What is 468 + 72 - m = 448, m = 92; 92 marbles. You can round the numbers: 470 + 70 - m = 450, m=90. So yes, the answer is reasonable.