Page 165 - NUMINO Challenge_M2
P. 165
Answer
Key
Operations
1. Making Expressions
EEExxxeeerrrccciiissseee To make an expression using 1 , 2 , 3 , and 6 , the sum of two numbers
must be equal to the difference between the other two numbers.
The sum of 1 and 2 is 3, which is the difference between 3 and 6 .
1 + 2 = 6 - 3 or 2 + 1 = 6 - 3
The sum of 1 and 3 is 4, which is the difference between 2 and 6 .
1 + 3 = 6 - 2 or 3 + 1 = 6 - 2
The sum of 2 and 3 is 5, which is the difference between 1 and 6 .
2 + 3 = 6 - 1 or 3 + 2 = 6 - 1
EEExxxeeerrrccciiissseee To make the greatest sum:
make the greatest sum here make the greatest sum here
95 92
+6 2 or + 6 5
157 157
65 62
+ 9 2 or + 9 5
157 157
To make the greatest difference:
greatest difference 2nd to the greatest difference
96
25
71
The greatest sum of 2-digit numbers: 157
The greatest difference between 2-digit numbers: 71
28 NUMINO Challenge M2
Key
Operations
1. Making Expressions
EEExxxeeerrrccciiissseee To make an expression using 1 , 2 , 3 , and 6 , the sum of two numbers
must be equal to the difference between the other two numbers.
The sum of 1 and 2 is 3, which is the difference between 3 and 6 .
1 + 2 = 6 - 3 or 2 + 1 = 6 - 3
The sum of 1 and 3 is 4, which is the difference between 2 and 6 .
1 + 3 = 6 - 2 or 3 + 1 = 6 - 2
The sum of 2 and 3 is 5, which is the difference between 1 and 6 .
2 + 3 = 6 - 1 or 3 + 2 = 6 - 1
EEExxxeeerrrccciiissseee To make the greatest sum:
make the greatest sum here make the greatest sum here
95 92
+6 2 or + 6 5
157 157
65 62
+ 9 2 or + 9 5
157 157
To make the greatest difference:
greatest difference 2nd to the greatest difference
96
25
71
The greatest sum of 2-digit numbers: 157
The greatest difference between 2-digit numbers: 71
28 NUMINO Challenge M2
