Tính:
----- Nội dung dịch tự động từ ảnh -----
Bài 1. Tính:
1) 12.18+14.3-255:17;
3) 13+21.5-(198:11-8);
5) 25.8-12.5+272:17-8;
7) 13.17-256:16+14:7-1;
9) 289:17-324:18+18:3;
11) (64+115+36)-25.8;
13) 19+19.99 -25.8;
15) 13(17—95+83):5–18:9;
17) 24 (15+30+85-120):10;
19) 18-4(27-90+73):10;
2) 68+42.5-625:25;
4)
272:16-5+4(30-5-255:17);
6) 125:25+14-142:71;
8) 15.24-14.5 (145:5-27);
10) 18.3-182 +3 (51:17);
12) 15.8-(17-30+83)-144:6;
14) 250:50-(46-75+54):5;
16) 140-180(47-90+43)+7;
18) 27+73-30: (25-10);
15-25.8:(100.2).