Page 167 - NUMINO Challenge_M2

AnswerType Study
Key

The smallest 2-digit number that can be made using 4, 5, 6, 7, 8, and 9 is 45.
The number that is subtracted and that belongs in the colored squares is 45.
The greatest possible 2-digit numbers that can be made with 6, 7, 8, and 9
are 97 and 86, or 96 and 87, which have greater number in the tens place
and smaller number in the ones place. The sum of these numbers is the
greatest possible sum, 183.

The greatest possible result can be made by 97-45+86=96-45+87=138.

Problem solving

1 To make the greatest possible sum with the number cards given, the hundreds

place must have the greatest number, which is 9 . The next two greatest
numbers must be placed in the tens places, and the last two numbers must be

placed in the ones places.

986 982

+ 7 2 or + 7 6

1058 1058

976 972

+ 82 or + 86

1058 1058

2 To make the greatest possible result, the number that is subtracted must be the

smallest number, 3. The number that is multiplied must be the greatest, 5, and
the number that is added must be the second greatest, 4.

2^ 5 - 3 + 4 =11

30 NUMINO Challenge M2