(2*1/2-5)-8(4*1/2-3)=4
1) 2× 1 2 = 2·1 2 = 2 2 = 1 = 1
2) 4× 1 2 = 4·1 2 = 4 2 = 2 · 2 2 = 2 = 2
3) 1 - 5= - (5 - 1) = - 4
4) 2 - 3= - (3 - 2) = - 1
5) 8×(-1) = - 8×1 = - 8
6) -4 - (-8) = 8 - 4 = 4
(2*1/2-5)-8(4*1/2-3)=4
1) 2× 1 2 = 2·1 2 = 2 2 = 1 = 1
2) 4× 1 2 = 4·1 2 = 4 2 = 2 · 2 2 = 2 = 2
3) 1 - 5= - (5 - 1) = - 4
4) 2 - 3= - (3 - 2) = - 1
5) 8×(-1) = - 8×1 = - 8
6) -4 - (-8) = 8 - 4 = 4