Question

16/9×括号7/8+2/3+1括号减1

16/9×括号7/8+2/3+1括号减1

Answer 1

16/9 ×(7/8+2/3+1)—1
=16/9 ×7/8+16/9 ×2/3+16/9× 1—1
=14/9+32/27+16/9—1
=30/9+32/27—1
=90/27+32/27-27/27
=85/27

追答

分子：90+32-27=95
最后应为95/27
减错了，改一下

Answer 2

16/9×（7/8+2/3+1）-1
=16/9×7/8+16/9×2/3+16/9×1-1
=14/9+32/27+16/9-1
=42/27+32/27+48/27-1
=122/27-1
=95/27

Answer 3

16/9*(7/8+5/3)-1=16/9*61/24-1=122/27-1=95/27

Answer 4

16/9×（7/8+2/3+1）-1
=16/9×（7/8+5/3）-1
=16/9×7/8+16/9×5/3-1
=14/9+80/27-1
=5/9+80/27
=95/27