Problem solving

1.9 Problem solving

Problem 1

Asma wants to form two-digit numbers using the number cards as follows.

How many numbers can be formed?

 
 

METHOD:

  1. Draw a table
  2. Write the digit of tens
  3. Then, write the digit of ones
Number begins with 6
64
61

 

Number begins with 4
46
41

 

Number begins with 1
14
16
So, there are 6 numbers altogether that can be formed by using card 4, 6 and 1.

Problem 2

Ali has 45 marbles.

Ali's marbles are 5 more than Kumar's mables.

How many Kumar's marbles?

Kumar's marbles are less 5 than Ali's marbles.

So, students need to count from 45 in descending order.

It is found out that Kumar's marbles are 40.

Problem solving

1.9 Problem solving

Problem 1

Asma wants to form two-digit numbers using the number cards as follows.

How many numbers can be formed?

 
 

METHOD:

  1. Draw a table
  2. Write the digit of tens
  3. Then, write the digit of ones
Number begins with 6
64
61

 

Number begins with 4
46
41

 

Number begins with 1
14
16
So, there are 6 numbers altogether that can be formed by using card 4, 6 and 1.

Problem 2

Ali has 45 marbles.

Ali's marbles are 5 more than Kumar's mables.

How many Kumar's marbles?

Kumar's marbles are less 5 than Ali's marbles.

So, students need to count from 45 in descending order.

It is found out that Kumar's marbles are 40.