Решите: 6422-24*(372: 12), 2678: (506-480)+297. 9*(1030-579)+941, 8000-(398+132)*15, (770-669)*(546-489). 136*(668-588)-404*25, 1540: 11+1890: 9+982.

6422-24*(372:12)= 5678
2678:(506-480)+297=400
9*(1030-579)+941=5000
8000-(398+132)*15=50
(770-669)*(546-489)=4047
136*(668-558)-404*25=4860
1540:11+1890:9+982=1332

1) 372:12=31; 24×31=961; 6422-961=5461
2) 506-480=26; 2678:26=103; 103+297=400
3) 1030-579=451; 9×451=4059; 4059+941=5000
4) 398+132=530; 530×15=2378; 8000-2378=5622
5) 770-669=101; 546-489=57; 101×57=5757
6) 668-588=80; 136×80=10880; 404×25=10100; 10880-10100=780
7) 1540:11=140; 1890:9=210; 140+210=350; 350+982=1332