=3.2×8+6.8×8=(3.2+6.8)×8=10×8=80
3.2÷0.125+6.8×8=3.2÷(1/8)+6.8×8=3.2×8+6.8×8=(3.2+6.8)×8=10×8=80
3.2÷0.125+6.8×8=3.2×8+6.8×8=(3.2+6.8)×8=10×8=80