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Calculati: a)7,2×14,25+5,75×7,2 b)(8,31×5,4-5,4×7,31)²×100

Răspuns :

 a)7,2×14,25+5,75×7,2=
102,60+41,40=144

b)(8,31×5,4-5,4×7,31)²×100=
(44,874-39,474)²×100=
5,4²x100=
29,16x100=2916
7,2×14,25+5,75×7,2=102,6+41,4=144 ; (44,874-39,474)la puterea 2×100= 5,4la putera2×100=(5,4×5, 4)×100=29.16×100=2916 sperc ca ți-am fost de ajutor