Page 141 - NUMINO Challenge_D1
P. 141
Answer Key
Number and Operations Type 1-1 Reaching a Target Number p.10~p.11
1 Four Fours and Target Numbers p.8~p.9 1 Since 111 89 22, use the remaining numbers
to form an equation that results in 22.
Example ,,, 12 5 5 5 5 89 111
,,;,,;,;,, Answers will vary.
Answers will vary. 2 Since 125 111 14, use the remaining numbers
to form an equation that results in 14.
TryItAgain Use two 9's to make the numbers 99, 18, 0, 125 5 5 5 8 9 111
81, and 1. Add another 9 to make the
numbers 27, 999, 9, 162, 2, 0, 90, 72, 729, 3 Since 113 111 2, use the remaining numbers
10, 8, 891, 11, and 108. Add another 9 to to form an equation that results in 2.
the 13 numbers above to continue the 12 5 55 58 9 111
pattern. Answers will vary.
999 93 Problem solving
999 98
9 99 99 1 Put 9 and 8 together to make 98, and use
9 9 9 9 10
99 9 9 20 numbers from 1 to 7 to make 2. Since the sum
of numbers from 1 to 7 is 28, put before
Answers will vary. numbers that add up to 13 in order make the
final result decrease by 26. Similarly, put two
Example 8, 9, 89 numbers together to form an equation that
11, , , , , or 11, , , , , results in a greater number. Use the remaining
numbers to form an equation that results in the
TryItAgain The sum of numbers from 1 to 9 is 45. If two difference, and calculate the respective answers.
adjacent numbers are put together to make 98 7 6 5 4 3 2 1 100
2-digit numbers, the total sum increases by a 9 8 76 5 4 3 21 100
multiple of 9. Also, if you reverse and 9 8 7 65 4 32 1 100
signs, the total sum becomes twice less than
the other sum. To result in a value of 55, the Answers will vary.
numbers should be greater than the sum of
numbers from 1 to 9. If you put 1 and 2 2 Put two adjacent numbers together or multiply
together to make 12, the total sum increases
by 12 (1 2) 9. However, 9 10 55 45. them to make the number closest to 104.
If you put 2 and 3 together to make 23, the 23 5 77 9 104
total sum increases by 23 (2 3) 18. Then, 23 5 7 79 104
you can put a sign in front of 4 to obtain 2 3 5 7 7 9 104
55 as the total result.
1 23 4 5 6 7 8 9 55
Answers will vary.
NUMINO Challenge D1
Number and Operations Type 1-1 Reaching a Target Number p.10~p.11
1 Four Fours and Target Numbers p.8~p.9 1 Since 111 89 22, use the remaining numbers
to form an equation that results in 22.
Example ,,, 12 5 5 5 5 89 111
,,;,,;,;,, Answers will vary.
Answers will vary. 2 Since 125 111 14, use the remaining numbers
to form an equation that results in 14.
TryItAgain Use two 9's to make the numbers 99, 18, 0, 125 5 5 5 8 9 111
81, and 1. Add another 9 to make the
numbers 27, 999, 9, 162, 2, 0, 90, 72, 729, 3 Since 113 111 2, use the remaining numbers
10, 8, 891, 11, and 108. Add another 9 to to form an equation that results in 2.
the 13 numbers above to continue the 12 5 55 58 9 111
pattern. Answers will vary.
999 93 Problem solving
999 98
9 99 99 1 Put 9 and 8 together to make 98, and use
9 9 9 9 10
99 9 9 20 numbers from 1 to 7 to make 2. Since the sum
of numbers from 1 to 7 is 28, put before
Answers will vary. numbers that add up to 13 in order make the
final result decrease by 26. Similarly, put two
Example 8, 9, 89 numbers together to form an equation that
11, , , , , or 11, , , , , results in a greater number. Use the remaining
numbers to form an equation that results in the
TryItAgain The sum of numbers from 1 to 9 is 45. If two difference, and calculate the respective answers.
adjacent numbers are put together to make 98 7 6 5 4 3 2 1 100
2-digit numbers, the total sum increases by a 9 8 76 5 4 3 21 100
multiple of 9. Also, if you reverse and 9 8 7 65 4 32 1 100
signs, the total sum becomes twice less than
the other sum. To result in a value of 55, the Answers will vary.
numbers should be greater than the sum of
numbers from 1 to 9. If you put 1 and 2 2 Put two adjacent numbers together or multiply
together to make 12, the total sum increases
by 12 (1 2) 9. However, 9 10 55 45. them to make the number closest to 104.
If you put 2 and 3 together to make 23, the 23 5 77 9 104
total sum increases by 23 (2 3) 18. Then, 23 5 7 79 104
you can put a sign in front of 4 to obtain 2 3 5 7 7 9 104
55 as the total result.
1 23 4 5 6 7 8 9 55
Answers will vary.
NUMINO Challenge D1
