Question

Решите плиз!!, ❤️❣️​

Answer 1

$1);-61.9-38.5=-(61.9+38.5)=-100.4\2);-38.5-61.9=-(38.5+61.9)=-100.4\3);-38.5+61.9=+(61.9-38.5)=23.4\4);38.5-61.9=-(61.9-38.5)=-23.4$