19.93+45.4-29.93简算
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19.93+45.4-29.93简算
19.93+45.4-29.93简算
19.93+45.4-29.93简算
=45.4-(29.93-19.93)
=45.4-10
=35.4
=19.93+10-29.93+35.4
=35.4
19.93+45.4-29.93简算
19.93+45.4-29.93简算
19.93+45.4-29.93简算
=45.4-(29.93-19.93)
=45.4-10
=35.4
=19.93+10-29.93+35.4
=35.4