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(31·3+74·5-32·9)-[200:20+(1000-693)]

Răspuns :

() = 175
31 × 3 = 93
74 × 5 = 370
32 × 9 = 288
93 + 370 - 288 = 463 - 288 = 175
[ ] = 317
200 : 20 = 10
1000 - 693 = 307
10 + 307 = 317
( ) - [ ] = 142
175 - 317 = - 142
(31·3+74·5-32·9)-[200:20+(1000-693)]
=(93+370-288)-(10+307)=
=(463-288)-317=
=175-317=
= -142