Question

Объясни выражение 90-52

Answer 1

567+9=576,439+5=444,356-7=349,564-9=555,90-52=38,790-52=738,49-21=28,490-210=280,57+3=60,570+30=600,38+20=58,380+200=580,42-7=35,420-70=350,90-9=81,690-9=681.