5×5=25
5+5+5+5=20 или 5×5-5=20
55:5=11 или ((5+5)×5+5):5=11
5×5+5×5=50
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20= 5+5+5+5
11= 5+5+5÷5
50= (5×5)+(5×5)
5×5=25
5+5+5+5=20 или 5×5-5=20
55:5=11 или ((5+5)×5+5):5=11
5×5+5×5=50