Unit 5 Math - 2nd Grade

Shapes & Their Attributes

100

Grace has a quadrilateral. How many angles does it have?

4 angles

200

Kevin sees a hexagon on the wall. How many vertices does it have?

6 vertices

300

Name 3 attributes of a pentagon.

5 sides, 5 vertices, 5 angles

400

Which statement about squares is true?

A) All squares have 5 sides.

B) No squares have equal sides.

C) All squares have equal sides.

C) All squares have equal sides.

500

Nova draws a shape with exactly 6 sides. What else must be true of her shape?

A) It is a cube.

B) It has 6 sides of the same length.

C) All angles are right angles.

D) It has 6 vertices.

D) It has 6 vertices.

Arrays

100

Write TWO addition equations to match the array.

OOOOOO
OOOOOO
OOOOOO

6 + 6 + 6 = 18
AND
3 + 3 + 3 + 3 + 3 + 3 = 18

200

Which TWO addition equations could you use to find the total number of circles in the array? Choose TWO correct answers.

A) 3+3+3=9

B) 4+4+4=12

C) 3+3+3+3=12

D) 4+4+4+4=16

E) 4+3=7

B) 4+4+4=12

AND
C) 3+3+3+3=12

300

Which TWO addition equations could you use to find the total number of squares in this partitioned rectangle? Choose TWO correct answers. 

A) 3 + 3 + 3 + 3 + 3 = 15

B) 5 + 5 + 5 + 5 = 20

C) 3 + 3 + 3 + 3 = 12

D) 5 + 5 + 5 = 15

A) 3 + 3 + 3 + 3 + 3 = 15 

AND

D) 5 + 5 + 5 = 15

400

Draw an array with 5 rows and 4 columns.

Write 2 repeated addition equations to match.

OOOO

OOOO
OOOO
OOOO
OOOO

5 + 5 + 5 + 5 = 20

4 + 4 + 4 + 4 + 4 = 20

500

Drew wants to fill the large white rectangle shown below. He uses 2 rows of 3 gray tiles to fill the rectangle first. How many total tiles does Drew use to fill the rectangle?

Drew uses  _____ tiles.

Drew uses 6 tiles.

Partitioning Shapes

100

Draw a square and divide it into halves.

Drawing should be a square split into 2 equal pieces.

200

John has a sandwich. It is a circle. He divides the sandwich into thirds. Which could be Berk’s sandwich?

A

B

C

D

D

300

Draw a shape divided into fourths.

Shape should be equally divided into 4 pieces.

400

Square A and Square B are both divided into equal parts. 

Decide if each statement about the squares is true. 

1) All of Square A is three thirds.

2) Both squares are divided into thirds.

3) Each part of Square B is three thirds.

4) Each part of Square A is one third.

1) True

2) True

3) False

4) True

500

The two squares below are the same size. Each square is divided into equal parts in a different way. 

Are the shaded parts equal in size? Explain your answer.

Yes, they are equal in size. The shaded triangle and rectangle are different shapes, but each covers one fourth of the whole square.

Odd or Even

100

Decide if 7 is odd or even. Show your work.

7 is an odd number.

200

Decide if 28 is odd or even. Show your work.

28 is an even number.

300

Write a doubles fact to show that 12 is even.

12 = _____ + _____

Write a doubles +1 fact to show that 9 is odd. 

9 = _____ + _____ + _____

12 = 6 + 6

9 = 4 + 4 + 1

400

Write a doubles fact to show that 18 is even.

18 = _____ + _____

Write a doubles +1 fact to show that 15 is odd. 

15 = _____ + _____ + _____

18 = 9 + 9

15 = 7 + 7 + 1

500

Amiyah wants to find out whether she has an odd or even number of dots. How can she rearrange the dots to make her decision? Then tell whether the number of dots is odd or even.   

Amiyah should try to put the dots into two equal groups. She can make 2 groups of 6. There are no leftovers so 12 is an even number.

(Students may also choose arrays of 4 rows of 3, 3 rows of 4, 6 rows of 2, 2 rows of 6.) 

Miscellaneous

100

Tell the difference between a square and a rectangle.

Squares have 4 equal sides. Rectangles have 2 sets of equal sides. 

Rectangles CAN be squares! Squares are ALWAYS rectangles.

200

Draw an array of your choice. No more than 30 objects. Write two repeated addition equations to match your array. 

Answers will vary.

300

Blanca has 2 jars of worms. Each jar has the same number of worms. Which could be the number of worms that Blanca has in all? Choose TWO correct answers.

A) 6

B) 7

C) 13

D) 15

E) 18

A) 6
AND
E) 18

400

Leylah found 28 seashells on the beach. She wants to know how she can arrange them in equal rows and colulmns. Draw one way. Write the two repeated addition equations that match your array.

Array can be: 

7 x 4, 4 x 7, 2 x 14, 14 x 2, 28 x 1, 1 x 28

500

Angela has rows of pepper plants in her garden. Two rows have 5 pepper plants each. Three rows have 3 pepper plants each. Can Angela draw an array to represent her garden? Explain your reasoning.

No, I cannot draw an array. The rows do not have the same number of plants. An array must have the same number of items in each row.