用你喜欢的方法计算．
9+99+999+9999+99999
124.68+324.68+524.68+724.68+924.68
998×999999﹣999×998998
17.48×37﹣174.8×1.9+17.48×82．
用你喜欢的方法计算．
9+99+999+9999+99999
124.68+324.68+524.68+724.68+924.68
998×999999﹣999×998998
17.48×37﹣174.8×1.9+17.48×82．
÷
=
×72= 2÷0.125=
﹣
﹣
= 99×
=
=
=
=
=
=
=
=
= 100×
=（
）×0=
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