1.156×157.157-157×156.1562.（8.88+8.88+8.88+8.88）×1.253.（6.4×7.5×8.1）÷（3.2×2.5×2.7）4.20.86÷12.5+0.8÷12.5-9.16÷12.5

1.156×157.157-157×156.156=156 ×157×1.001-157×156×1.001=02.（8.88+8.88+8.88+8.88）×1.25=(1.11+1.11+1.11+1.11)×8×1.25=4.44×10=44.43.（6.4×7.5×8.1）÷（3.2×2.5×2.7）= (6.4÷3.2)×(7.5÷2.5)...