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X5tech
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t 1.2-4p a(146+449):(3x5)+(898-23):25; b (8617-1345):(2x3)-(29-28x29);

Răspuns :

Mister7
a) [tex](146)+449):(3*5)+(898-23):25[/tex]
[tex]=645:15+875:25[/tex]
[tex]=43+35[/tex]
[tex]=78[/tex]

b) [tex](8617-1345):(2*3)-(29-28*29) \\ = 7272-(29-812) \\ =7272-29+812 \\ =7243+812 \\ = 8055[/tex]

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