\(\text{a) -72+ (154+76) }\)
\(=-72+230\)
\(=158\)
\(\text{b) (144-97) -144 }\)
\(=47-144\)
\(=-97\)
\(\text{c) -145- (-18-145) }\)
\(=-145-\left(-163\right)\)
\(=18\)
\(\text{d) 38-(12+13+14) }\)
\(=38-39=-1\)
\(\text{e)-144-(29-144-144) }\)
\(=-144-\left(-259\right)=115\)
\(-72+\left(154+74\right)\)
\(=\left(-72\right)+230\)
\(158\)
\(\left(144-97\right)-144\)
\(=47-144\)
\(=-97\)
\(-145-\left(-18-145\right)\)
\(=\left(-145\right)-\left(-163\right)\)
\(=18\)
\(38-\left(12+13+14\right)\)
\(=38-39\)
\(=-1\)
\(-144-\left(19-144-144\right)\)
\(=\left(-144\right)-\left(-259\right)\)
\(=115\)
