张爷爷家有一块平行四边形菜地，地的底长80米，高是50米，张爷爷准备在地中间修一条宽3米的路，修完路后，这块地实际种菜面积是多少平方米？
直接写出得数．×= 1÷=×= 77：63=÷9=×=÷8= 4：2.5=×=
×= 0×=÷====
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直接写出得数×3=×16=×=（+）×4=×+×=+=÷3= 4÷=
×1= 52﹣42= 0.75﹣0.5=×=÷= 125×0.08= 0.5+0.02=÷=÷= 0.15×6= 12÷0.3= 0÷=
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÷8= 4：2.5=
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×1= 52﹣42= 0.75﹣0.5=
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= 125×0.08=
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= 0.15×6= 12÷0.3= 0÷
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