(3/5+3/5+3/5+3/5)x0.25 2÷(1/3+2/5)x11/811/5x1/21+10/21x1/57/9×3/5÷7/9×3/598×98/99(7/9-2/3+5/6)×18解方程2/7x+1.2=6.21/4x-1/8x=7/10x:4/5=10

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(3/5+3/5+3/5+3/5)x0.25   2÷(1/3+2/5)x11/811/5x1/21+10/21x1/57/9×3/5÷7/9×3/598×98/99(7/9-2/3+5/6)×18解方程2/7x+1.2=6.21/4x-1/8x=7/10x:4/5=10
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(3/5+3/5+3/5+3/5)x0.25 2÷(1/3+2/5)x11/811/5x1/21+10/21x1/57/9×3/5÷7/9×3/598×98/99(7/9-2/3+5/6)×18解方程2/7x+1.2=6.21/4x-1/8x=7/10x:4/5=10
(3/5+3/5+3/5+3/5)x0.25   
2÷(1/3+2/5)x11/8
11/5x1/21+10/21x1/5
7/9×3/5÷7/9×3/5
98×98/99
(7/9-2/3+5/6)×18
解方程
2/7x+1.2=6.2
1/4x-1/8x=7/10
x:4/5=10

(3/5+3/5+3/5+3/5)x0.25 2÷(1/3+2/5)x11/811/5x1/21+10/21x1/57/9×3/5÷7/9×3/598×98/99(7/9-2/3+5/6)×18解方程2/7x+1.2=6.21/4x-1/8x=7/10x:4/5=10
按顺序,1,3/5 2,15/16 3,没抄错题的情况下307/105 4,9/25 5,自己算…(原因不不解释) 6,17 二,解方程 1,35/2 2,28/5 3,8 答案如上,