78×2×5= 56÷7÷2= 66÷66+1= 284﹣98=800×0.0001= 27×11= 8.75÷100= 24×5=
①7.2×46+108×3.6②③.
48.3×0.59﹣2.5×4.9×4+5.17×5.9.
计算下面各题,能简算的要简算. (1)12.5×19.95×0.4(2)÷.
3.7×7.3+7.3×6.3.
(1)0.35﹣10﹣(0.2+6.37÷0.7)×0.5(2)91×+9÷13﹣1÷13×100 (3)(﹣)×17﹣(4)53.5×1.9+61×1.25+41×8.1 (5)12×[( +)÷](6)×+56×+×.