口算.
2.5+3.7= 217÷7= 70﹣34=1.2×0.5= 1.3+27= 1.5÷0.5=4.5﹣0.5= 25×0.4= == = == = ==
直接写出得数:103.5﹣83= ÷2= 1﹣40%= ﹣= 0÷= 1﹣25%﹣70%=
直接写得数2.2+3.57= 11.3﹣8.6= 3.25×4= 14÷35= ÷6=﹣= ×= ÷= += ﹣=
直接写出得数.25+7.5= 200×3.6= 217﹣18= +×5=42÷0.02= 3﹣= ÷= (+)×56=
直接写出得数.0.78+0.22= = = 0÷=3+5%+17%= = 0.43+0.17+0.39= 8.4+=0.1÷0.01= 1.2×= 32×2.5= =742﹣299= 101×9.2﹣9.2= = =