下面各题怎样简便就怎样算+ 7.25﹣0.87﹣2.13 1236+998 12.5××0.8×.
计算.(能简算得要简算) 3.4÷[(1.25+0.45)×23].
脱式计算: 0.75÷0.25+×(8.6×0.5﹣)÷12÷[﹣(+)] [800×(1+25%)﹣360×1.5]÷25%15﹣[+(2.5﹣)]÷0.125.
脱式计算: (2808÷26﹣10.8)×2.5 9×0.125×12﹣9×0.125×4 (﹣)÷(÷)×÷[1﹣(+)].
直接写出得数 3500﹣700=0.4×0.2=9﹣0.9=24÷=204÷2=+=3.2﹣2=2+=1÷×1÷=0.9+99×0.9=
(1)+3.52++48%(2)×+(3)÷(5﹣3.9×) (4)25﹣25×(5)1000÷32÷0.25÷0.125(6)38﹣15.38+61.25﹣4.62.