城东小学准备在一条长100米的跑道两边栽树，从头到尾每隔5米载1棵树，一共要载多少棵树？
直接写出得数．×8=÷2=×=÷=÷=﹣0.6=×=÷10=+=÷= 16×= 1﹣7%=
直接写得数． 1÷=÷2= 4×20%=×4= （+）×12= 1÷75%= 1%÷10%= 42%﹣0.42=
直接写得数． 12×= 6÷=÷= 1÷×=×18=×0×=×=×26=
直接写出得数．×60= 12÷= 3.14×42=（）2=×=+=÷=÷=
直接写得数．×4=+=+=÷= 25÷=﹣=÷5=×= 2÷=﹣=×12= 2﹣﹣=
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