一块梯形麦田，上底是120米，下底是180米，高是80米，共收小麦720吨。这块麦田有多少公顷？平均每公顷收小麦多少吨？
×15=÷=÷50%= 8×25%=×0×=﹣= 0.5+=×=÷3=（﹣）×30=
16÷0.25====== 1﹣= 2.25+×=====
直接写得数×8=×= 81÷=÷= 63÷=÷=××= 3×÷3×= 36×25%=（﹣）×24=
直接写出得数： 25×= 1.8×=÷=÷3=﹣=﹣=（+）×30=÷×=．
直接写出得数 （1）6×=×=××2=+×0= （2）÷= 4.8÷=÷37.5%= 15%×60= （3）16：24=：= 1÷（0.36+0.14）=×÷×=
×15=
÷
=
÷50%= 8×25%=
×0×
=
﹣
= 0.5+
=
×
=
÷3=（
﹣
）×30=
=
=
=
=
= 1﹣
= 2.25+
×
=
=
=
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=
×8=
×
= 81÷
=
÷
= 63÷
=
÷
=
×
×
= 3×
÷3×
﹣
）×24=
= 1.8×
=
÷
÷3=
﹣
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﹣
=（
+
）×30=
÷
×
=．
=
×
=
×
×2=
+
×0=
÷
= 4.8÷
=
÷37.5%= 15%×60=
：
= 1÷（0.36+0.14）=
×
÷
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