Unit 1 Review

Basilio has 17 cats. She has 8 ginger cats. The rest of his cats are black. How many black cats does Basilio have? Which related facts can be used to solve the problem?

Choose the 2 correct answers.

• 17 = 8 + 9

• 18 = 9 + 9

• 19 - 10 = 9

• 17 - 8 = 9

Tags

CCSS.2.OA.A.1

Royce has 12 hedgehogs. 8 of them are girls and the rest are boys. How many boy hedgehogs does Royce have? Which related facts can be used to solve the problem?

Choose the 2 correct answers.

• 6 + 6 = 12

• 12 = 8 + 4

• 12 - 8 = 4

• 12 + 8 = 20

Tags

CCSS.2.OA.A.1

Ashleigh has 9 markers. Zekeo has 4 fewer pencils than Asheligh. What is a way to use counting back to find how many pencils Zekeo has?

• 4, 5, 6, 7

• 9, 10, 11, 12, 13

• 9, 8, 7, 6, 5

Tags

CCSS.1.OA.A.1

Which two repeated addition equations shows how to find the total number of triangles in the array?

• 4 + 4 + 4 + 4 + 4 = 20

• 10 + 10 = 20

• 5 + 5 + 5 + 5 = 20

• 15 + 5 = 20

Tags

CCSS.2.OA.C.4

Chana and Lianna make this array out of containers of playdough. Which repeated addition equation shows their array?

• 6 + 3 = 9

• 4 + 4 + 1 = 9

• 3 + 3 + 3 = 9

• 2 + 2 + 2 + 3 = 9

Tags

CCSS.2.OA.C.4

Which set has an odd number of counters?

• 
• 
• 

Tags

CCSS.2.OA.C.3

Ismael has an even number of melons in 2 baskets. Which shows how many melons could be in each basket?

• 8 melons and 8 melons

• 7 melons and 8 melons

• 12 melons and 14 melons

• 3 melons and 2 melons

Tags

CCSS.2.OA.C.3

Lianna and Santiago are trying to evenly split 18 crayons into 2 equal groups. Which doubles fact shows 18 as two even groups of two?

• 10 + 8

• 8 + 8

• 12 + 12

• 9 + 9

Tags

CCSS.4.NBT.B.6

Zaylen has 18 Dino Dollars. He spends 12. How many dollars does Zaylen have left?

Type your answer below.

Tags

CCSS.2.OA.A.1

Janessa and Serena are playing with Magnatiles. They use 12 squares to build one tower and 7 to build a second tower. How many squares did they use altogether?

Type your answer below.

Tags

CCSS.2.OA.A.1