Răspuns :
Răspuns:
[tex]\bf a)~ 3^{51} : 3^{48} +23^{1}\cdot 3^{3} +1220^{0}=[/tex]
[tex]\bf~ 3^{51-48} +23\cdot 27 +1=[/tex]
[tex]\bf~ 3^{3} +621 +1=[/tex]
[tex]\bf~ 27 +621 +1=\red{\underline{~649~}}[/tex]
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[tex]\bf b)~~ 3^{4}\cdot7^{2}+22^{1}\cdot 10^{3} - 154^{1}[/tex]
[tex]\bf ~ 3^{4}\cdot7^{2}+22\cdot 1000 - 154=[/tex]
[tex]\bf ~ 81\cdot49+22000 - 154=[/tex]
[tex]\bf ~3969+22000-154=[/tex]
[tex]\bf ~25969-154=\purple{\underline{~25815~}}[/tex]
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c) 13 - 3 × [7 - 2 × (5 - 3)] =
13 - 3 × (7 - 2 × 2) =
13 - 3 × (7 - 4) =
13 - 3 × 3 = 13 - 9 = 4
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d) 12 × {110 - 10 × [9 × 8 - 9 × (15 - 8)]} =
12 × [110 - 10 × (9 × 8 - 9 × 7)] =
12 × [110 - 10 × (72 - 63)] =
12 × (110 - 10 × 9) =
12 × (110 - 90) =
12 × 20 = 240