Page 144 - NUMINO Challenge_K2
P. 144
p.46 Draw a Picture Problem solving p.47
Type Study There are a total of 5 bicycles and tricycles. If there are 13 1 There are a total of 6 bicycles and tricycles. If there are 15
wheels, how many of each bicycle and tricycle are there?
wheels, how many of each type are there?
3 bicycles and 3 tricycles Tip
Draw 2 wheels for all
six bicycles. Then
think about how many
tricycles are needed
to make the total
number of wheels.
2 bicycles and 3 tricycles 2 5 children are standing. Some are lifting up one leg. If there
are 8 legs on the floor, how many children are lifting their leg?
Solving through Assumptions 2 children Tip
Consider that they are
A representative problem that is solved using assumptions is the problem of the crane and turtle. In this all lifting their legs and
problem, the total number of heads and legs are given, and the number of each animal needs to be solved. then draw legs one at
a time.
At an animal farm, there are cranes and turtles. When counted,
there were total of 6 heads and 18 legs. How many of each 47Problem Solving
animal are there?
If it is assumed that all 6 heads belong to a crane, then the total number of legs should be 12 since each crane
has 2 legs. The total number of actual legs is 18 which is a difference of 6. If 1 crane is changed to 1 turtle, the
number of legs will be increased by 2, so 3 cranes must be changed to 3 turtles. There are 3 cranes and 3 turtles.
46 NUMINO Challenge K2
Expressing facts and information through drawings accurately depicts the given
information. In other words, drawing a picture is one of the strategies for solving math
problems.
p.48 Standing in Line Problem solving p.49
Type Study Students are lining up in front of the classroom. Chris is 4th 1 Mary's book is 3rd from the left and 2nd from the right on her
from the front and 3rd from the back. How many students are
standing in line? Use the diagram below to solve the problem. shelf. How many books are on her bookshelf?
1st 2nd 3rd 4th English
Front 4 books
3rd 2nd 1st Back
2 Janice lives on the 3rd floor from the bottom and the 3rd floor
from the top. How many floors does the apartment have?
5 floors
6 students 1st
2nd
3rd 3rd
2nd
1st Tip
Think about the
number of floors from
the bottom.
Draw a Picture to Solve Problems 2nd
1st
When there are complex problems, it is sometimes difficult to determine the relevant conditions. The
conditions and relationships of those conditions in a problem can be clearly understood when drawing a 49Problem Solving
picture. The drawings do not have to be accurate depictions, and symbols, shapes, or graphs can be used to
represent the problem.
48 NUMINO Challenge K2
PWrhoebnlecmosmdpeaarilningg3wditihffesrteanntdoinbgjeicntsl,inmeecaasnurgeraebacshtuodbejenctst’winittheraesfot.uGrthuidobejethcet tshtautdceanntsatcot
afinsda msteatnhdoadrds,taondsoclvoeuntht ethsee npurmobblermosf ebaycdhroawbjiencgt tohecofamcptsaraenidndciroencdtliyti.ons of the word
problem. Help them to see the convenience in drawing pictures for solving problems.
15Answer Key
Type Study There are a total of 5 bicycles and tricycles. If there are 13 1 There are a total of 6 bicycles and tricycles. If there are 15
wheels, how many of each bicycle and tricycle are there?
wheels, how many of each type are there?
3 bicycles and 3 tricycles Tip
Draw 2 wheels for all
six bicycles. Then
think about how many
tricycles are needed
to make the total
number of wheels.
2 bicycles and 3 tricycles 2 5 children are standing. Some are lifting up one leg. If there
are 8 legs on the floor, how many children are lifting their leg?
Solving through Assumptions 2 children Tip
Consider that they are
A representative problem that is solved using assumptions is the problem of the crane and turtle. In this all lifting their legs and
problem, the total number of heads and legs are given, and the number of each animal needs to be solved. then draw legs one at
a time.
At an animal farm, there are cranes and turtles. When counted,
there were total of 6 heads and 18 legs. How many of each 47Problem Solving
animal are there?
If it is assumed that all 6 heads belong to a crane, then the total number of legs should be 12 since each crane
has 2 legs. The total number of actual legs is 18 which is a difference of 6. If 1 crane is changed to 1 turtle, the
number of legs will be increased by 2, so 3 cranes must be changed to 3 turtles. There are 3 cranes and 3 turtles.
46 NUMINO Challenge K2
Expressing facts and information through drawings accurately depicts the given
information. In other words, drawing a picture is one of the strategies for solving math
problems.
p.48 Standing in Line Problem solving p.49
Type Study Students are lining up in front of the classroom. Chris is 4th 1 Mary's book is 3rd from the left and 2nd from the right on her
from the front and 3rd from the back. How many students are
standing in line? Use the diagram below to solve the problem. shelf. How many books are on her bookshelf?
1st 2nd 3rd 4th English
Front 4 books
3rd 2nd 1st Back
2 Janice lives on the 3rd floor from the bottom and the 3rd floor
from the top. How many floors does the apartment have?
5 floors
6 students 1st
2nd
3rd 3rd
2nd
1st Tip
Think about the
number of floors from
the bottom.
Draw a Picture to Solve Problems 2nd
1st
When there are complex problems, it is sometimes difficult to determine the relevant conditions. The
conditions and relationships of those conditions in a problem can be clearly understood when drawing a 49Problem Solving
picture. The drawings do not have to be accurate depictions, and symbols, shapes, or graphs can be used to
represent the problem.
48 NUMINO Challenge K2
PWrhoebnlecmosmdpeaarilningg3wditihffesrteanntdoinbgjeicntsl,inmeecaasnurgeraebacshtuodbejenctst’winittheraesfot.uGrthuidobejethcet tshtautdceanntsatcot
afinsda msteatnhdoadrds,taondsoclvoeuntht ethsee npurmobblermosf ebaycdhroawbjiencgt tohecofamcptsaraenidndciroencdtliyti.ons of the word
problem. Help them to see the convenience in drawing pictures for solving problems.
15Answer Key
