Page 27 - NUMINO Challenge_A1
P. 27
Creative Thinking
1 Use the number cards 1 , 2 , 3 , and 0 without repetition, to make
dif ferent 3-digit numbers. Write the numbers in order from greatest to
smallest. What is the dif ference between the two numbers in the
colored blanks?
Key Point
Find the difference
between the third greatest
number and the second
greatest number.
2 Find all the 3-digit numbers that meet the following conditions.
Conditions
No digit in the number is repeated. All digits are
smaller than 5.
The digit in the tens place is an even number.
The number is divisible by 5.
Key Point
The ones digit of the
number that is divisible by
5 can either be 5 or 0.
24 NUMINO Challenge A1
1 Use the number cards 1 , 2 , 3 , and 0 without repetition, to make
dif ferent 3-digit numbers. Write the numbers in order from greatest to
smallest. What is the dif ference between the two numbers in the
colored blanks?
Key Point
Find the difference
between the third greatest
number and the second
greatest number.
2 Find all the 3-digit numbers that meet the following conditions.
Conditions
No digit in the number is repeated. All digits are
smaller than 5.
The digit in the tens place is an even number.
The number is divisible by 5.
Key Point
The ones digit of the
number that is divisible by
5 can either be 5 or 0.
24 NUMINO Challenge A1
