7×[7×7×(7-7÷7)-(7+7)+(7÷7)]-7÷7
=7×[49×6-14+1]-1
=7×281-1
=1966
7-(7+7)/7=5
7/7+ 7/7 =2
(7+ 7+ 7)/ 7 =3
77/7-7 =4
(7× 7-7)/ 7=6
(7-7)/ 7+ 7 =7
(7× 7+ 7)/ 7=8
(7+7)/7+7 =9
7+7-7+7 =14
注:/代表(除号)÷
7÷7+7÷7=2
77÷7-7=4
7-(7+7)÷7=5
(7×7-7)÷7=6
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答案是
7-(7+7)÷7=5
【计算过程】
7-(7+7)÷7
=7-14÷7
=7-2
=5
7777/7+777+777/7=1111+777+111=1999
(7 -7)+( 7 ÷7)+( 7 ÷ 7)
=0+1+1
=2
7+ 7-( 7+ 7)/ 7=12
7+7-7÷7=13