①45×15+105÷15
②6×102-72
③872-630÷21×19
④355-263-187+445
⑤66+66×99
⑥630÷45
①3.9+4.08+3.92+1.1 ② 85.7- (15.3-4.8)
③940×[128-(154-31)] ④ 3200÷4÷25
[180+19×(106+74)]÷60 40.65-(20.38-16.85)
87×47+53×87 73.72-(36.28+3.72)
①( ﹣ )×24
②0.36×99+0.36
③20.8﹣(9.6+0.125÷12.5%)
④( ﹣ ÷2)×
⑤2.5×16×12.5
⑥0.5÷[ ﹣( ﹣ )]
①1.25×3.2×2.5
②×[0.75﹣()]
③×()
④2022×
⑤55×102+646÷38