一个圆柱形水桶的底面直径是4分米，桶里水高度是4分米，水恰好占这个水桶容积的40%．计算这个水桶的容积是多少升？
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×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= ÷= ×÷×=
直接写得数．10÷= ÷= ×= 55×÷=×2= 1÷= ÷= 0×+=
口算我最棒= 26×= = = == = = 6.4÷20%= 125%×8=
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×1= 52﹣42= 0.75﹣0.5= 
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÷
= 125×0.08=
÷
= 0.15×6= 12÷0.3= 0÷
=
×16= 12÷
= 24×
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×
÷
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÷15= 
÷
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×
÷
×
=
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÷
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= 55×
÷
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×2= 1÷
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÷
= 0×
+
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= 26×
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= 6.4÷20%= 125%×8=
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