數學推理--化解為100的方法{共10題}

1) 1 + 23 - 4 + 56/7 + 8 x 9 =100 2) 1 + 2 + 3 x 4 x 56/7 - 8 + 9 =100 3) 1 - 2 - 3 + 4 x 56/7 + 8 x 9 = 100 4) 12 / 3 / 4 + 5 x 6 + 78 - 9 = 100 5) 1 + 234 x 5 x 6 / 78 + 9 = 100 6) 1 + 234 x 5 / 6 - 7 - 89 = 100 7) 1 x 2 - 3 + 4 + 56/7 + 89 = 100 8) 12 / 3 + 4 x 5 x 6 - 7 - 8 - 9 = 100

9) 12 / 3 + 4 x 5 - 6 - 7 + 89 = 100 10) 12 / 3 + 4 x 5 x 6 x 7 / 8 - 9 = 100 ................................................

11) 1 + 23 x 4 + 56/7 + 8 - 9 = 100 12) 1 / 2 x 34 - 5 + 6 - 7 + 89 = 100

13) 1 x 23 x 4 - 56 / 7 / 8 + 9 = 100 14) 1 x 23 - 4 - 56 / 7 + 89 = 100 15) 1 x 2 + 34 - 56 / 7 + 8 x 9 = 100 16) 1 + 2 x 3 - 4 + 56 / 7 + 89 = 100 17) 1 + 234 x 5 / 6 - 7 - 89 = 100

thank you very much for your help.