Algebra Readiness Made Easy Grade 1

HOW MUCH IS THIS BAG?

• What is the cost of one cherry? (2¢)


• How can you figure out the cost of one apple

and one cherry? (Add their prices: 5¢ + 2¢= 7¢)

• How can you figure out the cost of 2 apples

and 2 cherries? (The bag with 2 apples is 10¢.

Two cherries are 2¢ + 2¢= 4¢. The total cost is

10¢ + 4¢= 14¢.)

Work together as a class to answer the questions

in “Solve the Problem: How Much Is This Bag?”

Math Chat With the Transparency

Display the “Make the Case: How Much Is This

Bag?” transparency on the overhead. Before

children can decide which character is “wearing

smarty pants,” they need to figure out the answer

to the problem. Encourage children to work in

pairs to solve the problem. Then bring the class

together for another whole-class discussion. Ask:

• Who has the right answer? (Carl Cargo)


• How did you figure it out? (Two oranges are

12¢, so one orange is half of 12¢, or 6¢. Then

6¢ + 4¢ + 5¢= 15¢, the total cost of the three pieces

of fruit.)

• How do you think Shorty Trunks got the

answer of 21¢? (He might have added the costs

of the three bags: 12¢ + 4¢ + 5¢= 21¢.)

• How do you think that Levi Sam got the

answer of 14¢? (He might have found the total

cost of 2 plums and one strawberry by mistake;

5¢ + 5¢ + 4¢ = 14¢.)

65

1 apple

1 apple

and

1 cherry

3 apples

2 apples

and

2 cherries

HOW MUCH IS THIS BAG?

Name _____ Date __

66

SOLVE

THE

PROBLEM

Ima Thinker

The apples cost the same.

So, ¢ + ¢ = 10¢.

How much does each bag cost?

The apples each cost the same.

10¢

2 apples

2¢

1 cherry

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HOW MUCH IS THIS BAG?

Name _____ Date __

Who is wearing smarty pants?

Shorty Trunks

That’s easy.

The big bag of

fruit is 21¢.

Carl Cargo

The big bag of

fruit is really 15¢.

Levi Sam

I’m sure that

the big bag of

fruit is 14¢.

67

MAKE

THE

CASE

44 ¢¢

1

strawberry

55 ¢¢

1 orange

1 strawberry

and

1 plum

1122 ¢¢

22

oorraannggeess

How much does the big bag cost?

The oranges each cost the same.

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1 plum

Algebra Readiness Made Easy: Grade 1 © Greenes, Findell & Cavanagh, Scholastic Teaching Resources