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= -7+ -55=-62
2.= (25×-5) -(75+100)
=-125 - 175=-300
3.=(275:-25) - (25×5) +20
= -11 - (125 +20)=-11-145= -156
4.=-45-(-60:12)+18
=-45-(-5) + 18=45+5+18= 68
-125-75+100=
-200+100=
-100
3. ) 275:(-25)-25×5+20=
-11-125+20
-116
4.) -45-(-60):12+18=
15:12+18=
1,25+18=19,25