Ответ:
1) (3/4+1/20)×1/2=4/5×1/2=2/5
2)(7 ³/⁵-2⁴/¹⁵)×9/12=(38/5-34/15)×9/12=16/3×9/12=4×3/3=4
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Ответ:
1) (3/4+1/20)×1/2=4/5×1/2=2/5
2)(7 ³/⁵-2⁴/¹⁵)×9/12=(38/5-34/15)×9/12=16/3×9/12=4×3/3=4