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:( ) ()
()
.1×2×3×4 = 1 ()
()
2345 5
()
:( )
()
. 4 + 130 × 1 = 4 + 3 = 40 + 3 = 43 ()
5 5 5 50 50 50
:( )
. 1 + 1 = 1 × 10 + 9 = 19
9 2 10 2 90 180
:( )
.1 + 1 +1 = 3+4+2 = 9 = 3
4 3 6 12 12 4
.1− 3 = 1
44
:( )
. 6 × 3 × 1 6 × 3 ×1 18 9 4
2 2 2
= = = = 9× = 12
3 3 33 3
4 4 44
:( )
. 2 × 30 = 2 × 6 = 12
5
:( )
. 9 ×2 = 2 = 1
10 9 10 5