Bonsoir,
L'addition conserve l'ordre:
[tex]\boxed{a < b \Longrightarrow\ a+c < b+c}\\\\a < b \Longrightarrow\ a+1 < b+1\\\\a < b \Longrightarrow\ a+7.3 < b+7.3\\\\a < b \Longrightarrow\ a+\overline{8}<b+\overline{8}\ \Longrightarrow\ a-8<b-8\\\\a < b\ \Longrightarrow\\a-6<b-6\\0 <12 \\\Longrightarrow\ a-6<b+6\\\\a < b \Longrightarrow\ a+\sqrt{2}<b+\sqrt{2} \ \Longrightarrow\ b+\sqrt{2}>a+\sqrt{2}\\\\a < b \Longrightarrow\ a+10^{4}<b+10^{4}\\[/tex]
