（法库县）小明骑自行车过桥，桥长1500米，自行车车胎直径5分米，每分钟转动30圈，大约要用多少分钟才能通过这座桥？（得数保留整数）
×= 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÷=
直接写得数．×16= 12÷= 24×=×÷= 1÷=÷15=÷=×÷×=
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×3=
×16=
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÷3= 4÷
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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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×16= 12÷
= 24×
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÷15=
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