10-3= 6+1= 9+1= 8-3= 9-6= 4+3=
7.28+(1.72-0.5) 2.25×4.8+7.75×4.8
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