Question

例如：4-3-（2-1）=04 3 2 1 =14 3 2 1 =24 3 2 1 =34 3 2 1 =44 3 2

Answer 1

(4-3)×(2-1) =1

4-3+2-1 =2

(4-3)×(2+1) =3

4+3-2-1 =4

4+3-2×1 =5

4+3-2+1 =6

(4+3)×(2-1) =7

4+3+2-1 =8

4+3+2×1 =9

4+3+2+1 =10

4×3-2+1 =11

4×3×(2-1) =12

4×3+2-1 =13