11题看不清,,,,12题,,,,100除以40=2.5......240乘以2.5=600......51除以2.5=20.4......第13题:8.5乘以5.4=45.9.......45.9除以3=153棵
16.5/(10+1)=1.5 甲1.5*10=15 乙240/(40/100)=600kg51*(40/100)=20.4kg8.5*5.4=45.9m²45.9/0.3=153棵
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