Ответ:
4 - ( 4 21/40 - 5, 25) : 1 9/10
4-(181/40-21/4)×9/10
4-(-29/40)×9/10
4+29/40×9/10
4+261/400
1861/400
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Ответ:
4 - ( 4 21/40 - 5, 25) : 1 9/10
4-(181/40-21/4)×9/10
4-(-29/40)×9/10
4+29/40×9/10
4+261/400
1861/400