如图的长方形长5厘米，宽2厘米．（1）请在这个长方形里画一个最大的半圆，使所画的半圆与长方形组成的组合图形只有一条对称轴．（2）算一算，这个半圆的周长是 厘米．
直接写出得数． 6.5+0.5= 8.2﹣3.2= 5.8+4.2= 10﹣3.3﹣4.7==== 0.7×1.25×8=====
直接写出得数． 9.54+1.6= 0.32÷0.8= 90×40%= 5×6÷6×5== 7.2×== 1= 5﹣0.78= 1﹣= 0× 120÷（20+40）=
直接写出得数． 1.06+0.94= 0.18÷0.6=÷==1.25= 0.08×5= 2÷= 0.25×= 2.5÷1.25= 0.875÷=
直接写出得数． 1﹣0.09= 2÷0.02=÷= 8×125%= 0.45×101=（1﹣）×16= 2.5×0.7×0.4=×24÷= ：==
2.5+3.7= 217÷7= 70﹣34= 1.2×0.5= 1.3+27= 1.5÷0.5= 4.5﹣0.5=25×0.4=========
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= 0.7×1.25×8=
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= 5﹣0.78= 1﹣
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120÷（20+40）==== 1= 5﹣0.78= 1﹣= 120÷（20+40）=
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1.25=
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= 2.5÷1.25= 0.875÷
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= 8×125%=
）×16= 2.5×0.7×0.4=
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