Page 141 - NUMINO Challenge_K2
P. 141
Problem Solving
Exploration
1. Finding Possibilities
Unit Overview
Problem solving is the process of understanding a problem and finding various
methods to arrive at the solution. Learning math through repetition and
memorization does not give opportunities for students to think individually,
which is the main factor that cannot improve students’ problem solving skills.
This unit introduces problem solving methods such as drawing a tree diagram
and directly solving to find the possibilities of numbers. In addition, problems
that can be applied to real life situations are introduced, such as finding the
number of paths and matching, to capture the students’ interests.
1. Finding Possibilities
p.38 p.39
Use a Tree Diagram Solve Directly
Find the number of possibilities using a tree diagram. Problems can be solved by directly drawing paths or drawing
pictures.
There are 4 possible ways to choose one toy and one fruit.
Toys Four paths can be drawn from the house to the school by
Toy Fruit passing through the playground.
Car Doll Apple
Fruit Car
Apple Grapes Grapes
Apple
Doll
Grapes
EExxeerrcciissee How many paths can be drawn from the house to the
library by passing through the post office?
EExxeerrcciissee How many possible ways can a beverage and a food be 4 paths Library
chosen? Complete the tree diagram to find out.
Library
Menu Beverage Food Post Post
office office
Coke Sushi
Beverage Food Hamburger
Sprite Chicken
Sushi House House
Hamburger
Coke Sushi Chicken Library Library
Hamburger Post Post
office office
Sprite Chicken House House
6 ways 39Problem Solving
38 NUMINO Challenge K2
The number of possibilities can be found by using a tree diagram to connect the objects that
are related. Methods that are convenient differ according to each student. Guide the students
to find their most convenient method on their own.
12 NUMINO Challenge K2
Exploration
1. Finding Possibilities
Unit Overview
Problem solving is the process of understanding a problem and finding various
methods to arrive at the solution. Learning math through repetition and
memorization does not give opportunities for students to think individually,
which is the main factor that cannot improve students’ problem solving skills.
This unit introduces problem solving methods such as drawing a tree diagram
and directly solving to find the possibilities of numbers. In addition, problems
that can be applied to real life situations are introduced, such as finding the
number of paths and matching, to capture the students’ interests.
1. Finding Possibilities
p.38 p.39
Use a Tree Diagram Solve Directly
Find the number of possibilities using a tree diagram. Problems can be solved by directly drawing paths or drawing
pictures.
There are 4 possible ways to choose one toy and one fruit.
Toys Four paths can be drawn from the house to the school by
Toy Fruit passing through the playground.
Car Doll Apple
Fruit Car
Apple Grapes Grapes
Apple
Doll
Grapes
EExxeerrcciissee How many paths can be drawn from the house to the
library by passing through the post office?
EExxeerrcciissee How many possible ways can a beverage and a food be 4 paths Library
chosen? Complete the tree diagram to find out.
Library
Menu Beverage Food Post Post
office office
Coke Sushi
Beverage Food Hamburger
Sprite Chicken
Sushi House House
Hamburger
Coke Sushi Chicken Library Library
Hamburger Post Post
office office
Sprite Chicken House House
6 ways 39Problem Solving
38 NUMINO Challenge K2
The number of possibilities can be found by using a tree diagram to connect the objects that
are related. Methods that are convenient differ according to each student. Guide the students
to find their most convenient method on their own.
12 NUMINO Challenge K2
