Page 151 - NUMINO Challenge_C1

Answer Type 6-2 Matchstick Puzzles (Finding the Area) p.54~p.55
Key 1

Problem solving

1 Since the result is small, change the plus sign

into a minus sign.

2

2 Since you cannot change 'x' into another 3
4
operation symbol by moving just one match-

stick, change the numbers. There are three ways

you can form a new number by adding or

removing one matchstick from and .

Add one matchstick to to form the

number , so that .

Add one matchstick to to form , so that

.

Remove one matchstick from to form , so

that . Among , , and Problem solving

, the only number that can be formed by 1

adding or removing one matchstick from

is . Therefore, remove one matchstick

from in and change into . Area: 6 Area: 8 Area: 9

2

Area: 4 Area: 5 Area: 5 Area: 6
Answers will vary.

NUMINO Challenge C1