"(1+5)×(4-5)×(-4-5)÷1=54补充:(1 + 5)×( 4 - 5)×( -4- 5)÷ 1
=6×(-1)×(-9)
=(-6)×(-9)
=54补充:方法二:
1 × ( 5 + 4 )×( 5 - 4 + 5 )× 1=54补充:3、 (1 × 5+ 4 )× (5-4+5)÷ 1=54补充:4、 1×(5-4+5)×(4+5)×1=54
5、 1×(5-4)×(5+4)×(5+1)=54"
"(1+5)×(4-5)×(-4-5)÷1=54补充:(1 + 5)×( 4 - 5)×( -4- 5)÷ 1
=6×(-1)×(-9)
=(-6)×(-9)
=54补充:方法二:
1 × ( 5 + 4 )×( 5 - 4 + 5 )× 1=54补充:3、 (1 × 5+ 4 )× (5-4+5)÷ 1=54补充:4、 1×(5-4+5)×(4+5)×1=54
5、 1×(5-4)×(5+4)×(5+1)=54"