9 + 9 x 9 = () + () x9 = 90000 18 + 98x 9 = () + () x9 = 9000000 117 + 987 x9 = () + () x9 = 9000000 법칙 을 찾다

9 + 9 x 9 = () + () x9 = 90000 18 + 98x 9 = () + () x9 = 9000000 117 + 987 x9 = () + () x9 = 9000000 법칙 을 찾다

9 + 9 x 9 = 90
18 + 98x 9 = 900
117 + 987 x 9 = 9000
1116 + 9876 x9 = 90000
(11115) + (987.65) x9 = 900000
(111114) + (9887654) x9 = 9000000
(1111113) + (987543) x9 = 9000000

0.111 순환 은 9 분 의 1 인가요? 1.111 순환 x9 = 0.999 순환, 9 분 의 1 x9 = 1.

0.111 순환 은 9 분 의 1,
0. 11 순환 x9 = 0.999 순환 = 1.

2 × - 1.8 = × + 2.4 3 × 2 (10 - ×) = 15 (2 × + 3) × 2 = 5 × - 4 18 규 4 × - 3 = 9 (4 - ×) x7 = (× - 4) x9

2 × - 1.8 = × + 2.4
x = 2.4 + 1.8
x = 4.2
3 × - 2 (10 - ×) = 15
3x - 20 + 2x = 15
5x = 35
x = 7
(2 × + 3) × 2 = 5 × - 4
4x + 6 = 5x - 4
5x - 4x = 6 + 4
x = 10
18 규 4 × 3 = 9
18 - 12 x = 36x
48x = 18
x = 3 / 8
(4 - ×) x7 = (× - 4) x9
16 (x - 4) = 0
x = 4