Question

勇敢的数学之王进来啊 接受我的挑战吧

Answer 1

0.01×[(13-2.8)÷0.3]

= 0.34

12/13 ÷ (3×1×5/13/7)

= 12/13 ÷ (15/91)

= 12×91/13/15

= 28 / 5

2 - 15/16÷(3/4)×4/3

= 2 - 60/48 × 4/3

= 2 - 60/36

= 2 - 5/3

= 1/3

两根1米长的铁丝,第一根截去它的3分之2米,第二根截去它的3分之2米,哪根长?

剩下的两根铁丝的长度相等.