6+3= 7+2= 9+1=7+1= 8-5= 6-3=
3.8×13+8.7×38[0.85+(9.25+0.65)÷0.2]×20
132-1.05÷10.5+27[4.75+8.4÷(9.2-6.8)]×40
7.8×36+78×6.4 10.8+6.7-10.8+4.3
86.4÷3.2-6.4×3.2 32.4×O.9+0.1×32.4
168.1÷(4.3×2-0.4) 168.8÷(24.3×2-6.4)