①2921+2-1÷7 ②98-(512-18)
③7413-114+913-2.75 ④12+16+112+120+130+142
①315+4.06÷6.05 ②1.9×9.9+99100 ③15+4÷12+23
④58-(38-14) ⑤34-12+56-512 ⑥3.75-916+116-750
25×926 (12−38)×32
54×16×36 59×34+59×14