口算:160+270=730-250=260+90=36+74=2400÷200=770+140=11×500=9900÷900=22÷22×56÷56=12÷(10×6-54)=87+87÷87-87=50×42×20=970-174-326=1250×80=
网友回答
解:160+270=430730-250=480260+90=35036+74=1102400÷200=12770+140=91011×500=55009900÷900=1122÷22×56÷56=112÷(10×6-54)=287+87÷87-87=150×42×20=42000970-174-326=4701250×80=100000故