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(9x7+7x80X4-(404;4+44;4);2.............................AL DOILEA...1000-(250;2+25x3)x3-(25+15x5)x4...............al treilea....23x(157-24x6)-477;3-(22+220;2)...........va rog mult

Răspuns :

1) (9x7+7x80x4-(404:4+44:4):2
=(63+2240-(101+11):2
=(2303-112):2
=1095,5

2)1000-(250:2+25x3)x3-(15+15x5)x4
=1000-(125+75)x3-(15+75)x4
=1000-200x3-90x4
=1000-600-360
=40

3) 23x(157-24x6)-477:3-(22+220:2)
=23x(157-144)-159-(22+110)
=23x13-159-132
=299-259-132
=8

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