(1)0.3+9.7×0.23(2)91.6﹣3.8﹣6.62(3)1.03×(8.8÷0.25)(4)2.23×7.5﹣2.23+3.5×2.23(5)1.2÷[(5.1﹣3.6)×0.08](6)99.9+9.9+0.9+0.3.