①12.7﹣3.6﹣5.4
②15×43%+85×0.43
③0.25×80+45÷
+÷+ 43×-31÷ (90+)×
++++……+
①6.4×2.5×1.25
②8.5×98%
③÷4+×
④×
①1.25×3.2×2.5
②×[0.75﹣()]
③×()
④2022×
⑤55×102+646÷38