Răspuns:
1.
10.000-38×49-6.259
10.000-1.862-6.259
8.138-6.259
=1.879
2.
8036-(9+236×3-6×22)
8036-(9+708-132)
8036-(717-132)
8036-585
=7.451
3.
(700-30:3):5+240×3-(75×0×49+13)
(700-10):5+240×3-(0×49+13)
690:5+240×3-(0+13)
690:5+240×3-13
138+720-13
858-13
=845