Page 172 - NUMINO Challenge_L1
P. 172
Type StudyProblem solving
1 The smallest number has the smallest digit in the tens place. 14
If all the possible numbers were written in order from greatest to smallest, it
would be as follows.
87, 85, 83, 78, 75, 73,
The second greatest number is 85.
The numbers greater than 30 and less than 40 are shown.
31, 32, 33, 34, 35, 36, 37, 38, 39
From , the number whose digits have the sum of 9 is 36.
Problem solving
1
71 44
26 62
35 53
44 80
2
The sum of the The digits in the tens
digits is 12.
place is greater than
digits in the ones place
66 48 75
57 73 42
75
The number that fits both conditions is 75. 43Answer Key
1 The smallest number has the smallest digit in the tens place. 14
If all the possible numbers were written in order from greatest to smallest, it
would be as follows.
87, 85, 83, 78, 75, 73,
The second greatest number is 85.
The numbers greater than 30 and less than 40 are shown.
31, 32, 33, 34, 35, 36, 37, 38, 39
From , the number whose digits have the sum of 9 is 36.
Problem solving
1
71 44
26 62
35 53
44 80
2
The sum of the The digits in the tens
digits is 12.
place is greater than
digits in the ones place
66 48 75
57 73 42
75
The number that fits both conditions is 75. 43Answer Key
