①3.16+2.25+7.75
②5×32×125
③34×99+34
④56×8÷56×8
⑤12.39-(8.39+0.56)
⑥2600÷5÷20
①276500=
②4700=
③108000=
①13-4.85-3.15
②12.5×7.6×0.8
③17.8+2.2×4.5
④6.15×10.1
⑤4.5×3.6+5.5×3.6
⑥12.73+6.2+6.27+3.8
①﹣+-
②(﹣)×18×12
③2×1.5+4.5÷0.75
④69×9.9+6.9