①
②
③
④
⑤
⑥
①××24×25
②×20
③×
④86××
⑤××
⑥××
①×××5
②×39×
③××
④21××
①×+×
②48×(+)
③×48
④13×-
⑤+
⑥+
①×-×
②×11+
③×16×
④(+)×24
⑤4.8×(-)
⑥2021×