Starfish and Banana Problem Solving

Natalie Rhodes presents a 5th-grade math lesson focusing on multiplying decimals less than one with whole numbers using visual models. The lesson includes solving problems involving the weight of bananas and the speed of a starfish, emphasizing the use of grids and tenths bars to represent decimal multiplication. Students are encouraged to use both addition and multiplication to find solutions.

What is the main objective of this lesson?

• To represent the product of a decimal less than one and a whole number using a visual model

• To understand division of whole numbers

• To learn about fractions

• To explore addition of decimals

What prior knowledge is necessary for this lesson?

• Understanding of fractions

• Knowledge of multiplication tables

• Recognition of place value in multi-digit numbers

• Ability to solve algebraic equations

In the banana weight problem, what is the weight of one banana?

• 0.75 pounds

• 0.28 pounds

• 1.0 pounds

• 0.5 pounds

How many bananas does Mary buy in total?

• One

• Two

• Three

• Four

Why is a grid of 100 used in the banana weight problem?

• To represent whole numbers

• To make calculations easier

• Because the weight is in the tenths place

• Because the weight is in the hundredths place

How many squares are colored for each banana in the grid?

• 30 squares

• 28 squares

• 20 squares

• 10 squares

What is the total weight of the three bananas?

• 0.56 pounds

• 1.0 pounds

• 0.72 pounds

• 0.84 pounds

In the starfish problem, what is the speed of the starfish?

• 0.8 miles per hour

• 1.0 miles per hour

• 0.2 miles per hour

• 0.5 miles per hour

How many hours does the starfish travel?

• Five hours

• Two hours

• Four hours

• Three hours

What type of grid is used for the starfish problem?

• A grid of 10 bars

• A grid of 50 squares

• A grid of 100 squares

• A grid of 20 bars