①3.12÷15+12.5×28
②
③
④
+x=36 6.5:x=3.25:4
①1.25×3.2×2.5
②×[0.75﹣()]
③×()
④2022×
⑤55×102+646÷38
①12.7﹣3.6﹣5.4
②15×43%+85×0.43
③0.25×80+45÷
9.9×5.9 60 1