Page 145 - NUMINO Challenge_B1
P. 145
Answer
Key
3 Four Fours p.24~p.25 Problem solving
Example 16, 16, (5 9 3) 2, 17 (5 9 3) 2 1 1 The numbers that you can make with 3 and 4
TryItAgain In order to get the greatest possible answer, are 34, 43, 4 3 7, 4 3 1, 4 3 12. The
try to subtract or divide by the smallest
answer and multiply by the greatest numbers you can make with 2 and 1 are 12, 21,
number. Place the parentheses before 5 and
after 2. This way, you divide first, add and 2 1 3, 2 1 1, 2 1 2, 2 1 2. Use this
subtract, and then multiply the result by 3.
(5 8 6 2) 3 30 information to form equations with answers
from 0 to 5.
110 (4 3) (2 1) 0
Example 3 1 1 1 3 (3 3) (3 3) 1 111 (4 3) (2 1) 1
3112 3 (3 3) (3 3) 2 112 (4 3) (2 1) 2
3113 3 (3 3) (3 3) 3 123 (4 3) 2 1 3
3114 3 (3 3) (3 3) 4 12 3 4 (4 3) (1 2) 4
3115 3 (3 3) (3 3) 5 725 (4 3) 2 1 5
Answers will vary.
2 The numbers that you can make with 2 and 3
are 23, 32, 2 3 5, 3 2 1, 3 2 6. The
Answers will vary. numbers you can make with 4 and 5 are 45, 54,
4 5 9, 5 4 1, 5 4 20. Use this information
TryItAgain Use 3 and 7 to write an equation that results to form equations with answers from 0 to 6.
in an answer closest to 25. The closest
answer to 25, using 3 7, is 21. Then 110 (3 2) (5 4) 0
subtract the remaining 3 from the remaining
7 to get 4. 111 (3 2) (5 4) 1
3 7 7 3 25
112 (3 2) (5 4) 2
963 (4 5) 3 2 3
514 (2 3) (5 4) 4
515 (2 3) (5 4) 5
516 (2 3) (5 4) 6
Type 3-1 Four 6's p.26~p.27 Answers will vary.
1 111 66661 Type 3-2 Inserting Parentheses p.28~p.29
112 66662 1 100 (70 20) 5 82
2 {100 (70 20) 5} 2 164
2 624 6 (6 6) 6 4 3 100 70 20 (5 2)
628 6 (6 6) 6 8 4 {100 (70 20)} (5 2) 1
5 164 1 163
3 18 6 3 (6 6 6) 6 3
30 6 5 (6 6 6) 6 5
4 606 6 (6 6) 6 6
42 6 7 (6 6 6) 6 7
NUMINO Challenge B1
Key
3 Four Fours p.24~p.25 Problem solving
Example 16, 16, (5 9 3) 2, 17 (5 9 3) 2 1 1 The numbers that you can make with 3 and 4
TryItAgain In order to get the greatest possible answer, are 34, 43, 4 3 7, 4 3 1, 4 3 12. The
try to subtract or divide by the smallest
answer and multiply by the greatest numbers you can make with 2 and 1 are 12, 21,
number. Place the parentheses before 5 and
after 2. This way, you divide first, add and 2 1 3, 2 1 1, 2 1 2, 2 1 2. Use this
subtract, and then multiply the result by 3.
(5 8 6 2) 3 30 information to form equations with answers
from 0 to 5.
110 (4 3) (2 1) 0
Example 3 1 1 1 3 (3 3) (3 3) 1 111 (4 3) (2 1) 1
3112 3 (3 3) (3 3) 2 112 (4 3) (2 1) 2
3113 3 (3 3) (3 3) 3 123 (4 3) 2 1 3
3114 3 (3 3) (3 3) 4 12 3 4 (4 3) (1 2) 4
3115 3 (3 3) (3 3) 5 725 (4 3) 2 1 5
Answers will vary.
2 The numbers that you can make with 2 and 3
are 23, 32, 2 3 5, 3 2 1, 3 2 6. The
Answers will vary. numbers you can make with 4 and 5 are 45, 54,
4 5 9, 5 4 1, 5 4 20. Use this information
TryItAgain Use 3 and 7 to write an equation that results to form equations with answers from 0 to 6.
in an answer closest to 25. The closest
answer to 25, using 3 7, is 21. Then 110 (3 2) (5 4) 0
subtract the remaining 3 from the remaining
7 to get 4. 111 (3 2) (5 4) 1
3 7 7 3 25
112 (3 2) (5 4) 2
963 (4 5) 3 2 3
514 (2 3) (5 4) 4
515 (2 3) (5 4) 5
516 (2 3) (5 4) 6
Type 3-1 Four 6's p.26~p.27 Answers will vary.
1 111 66661 Type 3-2 Inserting Parentheses p.28~p.29
112 66662 1 100 (70 20) 5 82
2 {100 (70 20) 5} 2 164
2 624 6 (6 6) 6 4 3 100 70 20 (5 2)
628 6 (6 6) 6 8 4 {100 (70 20)} (5 2) 1
5 164 1 163
3 18 6 3 (6 6 6) 6 3
30 6 5 (6 6 6) 6 5
4 606 6 (6 6) 6 6
42 6 7 (6 6 6) 6 7
NUMINO Challenge B1
