把下面这个展开图折成一个长方体．（1）如果A面在底部，那么 面在上面．如果F面在前面，从左面看是B面， 面在右面．（2）测量有关数据（取整厘米数），算出它的表面积和体积．
你能直接写出下列各题的结果吗？试试看×=÷=××= 4.5%=×12=÷4= （+）×== %
计算．×÷÷××÷6×÷7÷．
直接写得数．= 24÷======
直接写出得数． 12×=÷= 0÷=﹣= 12×（×）=×=÷= 20÷=+=×90×=
直接写出得数：×12= 1÷=×=+=÷2= 6﹣= 0÷=×=÷=﹣=
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×12= 1÷
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