小军从1楼走到2楼用了8秒，用同样的速度，从1楼走到6楼要用多少秒？
×= 0×=÷====
直接写出得数×3=×16=×=（+）×4=×+×=+=÷3= 4÷=
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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=÷=×÷×=
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×1= 52﹣42= 0.75﹣0.5=
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×16= 12÷
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