把一张长方形的纸，对折再对折，每次对折后，每份占这张纸的几分之几？对折次数 1 2 3 4 5每份占几分之几
直接写得数÷4= += ÷= ×= 8×=2÷= 1÷= 1﹣﹣= 2﹣= 2××=
直接写出得数．÷= 202﹣99= 3.5÷1000= 28÷1%=34×50= ×= 1.24÷0.4= 42×0.2=+= ﹣= ÷6= 1+99%=
直接写得数．= = 1= == 2﹣= = =
直接写出得数．2÷= 0.75÷0.25= 7×60%= 233﹣198= 175﹣75×=×= 4﹣= 5×23= ×= 2×÷2×=
谁平均一步的长度长一些？（小冬7步走了4米，小红10步走了6米．）
÷4= 
+
= 
÷
= 
×
= 8×
=
= 1÷
= 1﹣
﹣
= 2﹣
= 2×
×
=
÷
= 202﹣99= 3.5÷1000= 28÷1%=
×
= 1.24÷0.4= 42×0.2=
+
= 
= 
÷6= 1+99%=
= 
= 1
= 
=
= 2﹣
= 
= 
=
= 0.75÷0.25= 7×60%= 233﹣198= 175﹣75×
=
×
= 4﹣
= 5×23= 
×
= 2×
÷2×
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