1st–2nd GradeObjectives

CCSS Math/Operations and Algebraic Thinking: 1.OA.1, 1.OA.2

• Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing with unknowns in all positions by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.

• Solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20 by using objects, drawings, and situations with a symbol for the unknown number to represent the problem.

Materials Needed• Animals on Board by Stuart J. Murphy• Wild Animal Counters [LM986] or other animal manipulatives• Animal Story Problems and answer key • Create-Your-Own Animal Story Problems• Easel, document camera, chart paper, chalkboard or whiteboard [to display problems]Products with item numbers are available at LakeshoreLearning.com.

Introduction

Read aloud Animals on Board by Stuart J. Murphy. As you read, encourage students to help you solve the word problems that are presented in the story. Then point out how the problems are represented in numeric form to show the sum. For example, you might say, “There were three tigers. Along came two more. 3 + 2 = how many?”

Procedure 1. Using a variety of Wild Animal Counters, show students how to set up story problems and solve for the

answers. (Other animal manipulatives that include the animals in the problems can be used.) Model ways to set up and solve equations. For example, use five zebras and two goats. Say, “Five zebras were running across a field. Two goats joined them. How many animals are there now? 5 + 2 = 7.”

2. Display each of the Animal Story Problems on an easel, document camera, chart paper, chalkboard or whiteboard for students to see. (An answer key is provided.) Then invite a few volunteers at a time to use the animals to “act out” the story problem. Do the first two problems, and then have students complete the remaining equations independently or with a partner.

Independent Practice

1. Give each student a copy of the Create-Your-Own Animal Story Problems, or have them share one copy with a partner. Challenge students to fill in numbers to create their own story problems. Then have students—or their partners—solve their problems and write the correct answer.

2. Invite students to share the problems they created and “act out” the story with their animal manipulatives to illustrate the problems.

3. Make copies of the Animal Story Problems and Create-Your-Own Animal Story Problems, and place them in a center with the animal manipulatives. Invite students to practice animal math!

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Four panthers are lying in the sun. Two more panthers join

them. How many panthers are in the sun now?

Six monkeys are swinging from branches in a tree, when four of them decide to climb down. Two monkeys

in the tree decide to swing to a different tree. How many monkeys

are left in the first tree?

There are seven zebras chewing on grass. Three more zebras join them. How many zebras

are there in all?

There are six pandas eating bamboo. Then two of those

pandas fall asleep. How many pandas are still eating bamboo?

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There are 15 apes grooming each other. Four apes leave the group to find food. How many

apes are left?

Five wild pigs, or boars, are standing in a meadow. Three more boars and six goats join them. Then two of the

boars wander off. How many animals are left in the meadow?

Park rangers find three mountain lions near a trail, four near a waterfall, and

two on a mountain. The mountain lions near the waterfall roam into a

cave. How many mountain lions are not in the cave?

Jack is on a safari. He sees 15 animals in the desert and seven animals in the jungle.

How many more animals are in the desert than in the jungle?

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A train is on its way to the zoo. There are

_________ pandas in the first train car,

________ tigers in another train car, and

_______ polar bears in the last train car.

How many animals are on the train in all?

________ camels are walking

across the desert. ________camels run away. How many

camels are left?

___________ monkeys are sleeping on

one side of a tree and

___________ monkeys are sleeping on the

other side. ____________ monkeys wake up from the sound of thunder.

How many monkeys are still sleeping?

We see ________ wolves

sleeping in a den. ________wolves join them. How many wolves are in the den now?

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There are __________ hippopotamuses

near a pond. ________ of themjump into the water. How many

hippopotamuses are not in the water?

___________ zebras and _________ lions

are running across the grass.

________ monkeys join them. How many

animals are running across the grass?

______________ kangaroos arehopping across the plain.

_______________ kangaroos stopfor a rest. How many kangaroos are

still hopping?

There are ___________ gorillas,

___________ giraffes, and _____________

zebras in a parade. How many animals

are in the parade altogether?

4 + 2 = 6

15 – 4 = 11

6 – 2 = 4

15 – 7 = 8

6 – 4 = 22 – 2 = 0

5 + 3 + 6 = 1414 – 2 = 12

7 + 3 = 10

3 + 4 + 2 = 99 – 4 = 5

Four panthers are lying in the sun. Two more panthers join

them. How many panthers are in the sun now?

Six monkeys are swinging from branches in a tree, when four of them decide to climb down. Two monkeys

in the tree decide to swing to a different tree. How many monkeys

are left in the first tree?

There are seven zebras chewing on grass. Three more zebras join them. How many zebras

are there in all?

There are six pandas eating bamboo. Then two of those

pandas fall asleep. How many pandas are still eating bamboo?

There are 15 apes grooming each other. Four apes leave the group to find food. How many

apes are left?

Five wild pigs, or boars, are standing in a meadow. Three more boars and six goats join them. Then two of the

boars wander off. How many animals are left in the meadow?

Park rangers find three mountain lions near a trail, four near a waterfall, and

two on a mountain. The mountain lions near the waterfall roam into a

cave. How many mountain lions are not in the cave?

Jack is on a safari. He sees 15 animals in the desert and seven animals in the jungle.

How many more animals are in the desert than in the jungle?

©Lakeshore www.lakeshorelearning.com