Сложите числа \(\displaystyle 5{,}5\) и \(\displaystyle 1{,}5\small.\)
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Сложите числа \(\displaystyle 5{,}5\) и \(\displaystyle -5{,}5\small.\)
Сложите числа \(\displaystyle 5{,}5\) и \(\displaystyle -7\small.\)
Сложите числа \(\displaystyle 5{,}5\) и \(\displaystyle 0\small.\)