
【解答】解:3.64+0.48=4.1250-37.5=12.511.6+1.4=1313+37-13+37=74400×6=240011×800=88002.5+0.9=3.40.39+0.61=141.5-41=0.5360÷30=1212×25=300528-53-47=42880.9÷8.8≈912.1×9.9≈12048÷8×9=547.6+0.8-5.6=2.8

【解答】解:3.64+0.48=4.1250-37.5=12.511.6+1.4=1313+37-13+37=74400×6=240011×800=88002.5+0.9=3.40.39+0.61=141.5-41=0.5360÷30=1212×25=300528-53-47=42880.9÷8.8≈912.1×9.9≈12048÷8×9=547.6+0.8-5.6=2.8