①5.2-2.99 ② 3.07-1.57+6.93-3.43 ③408×75 ④25×(24+56)
⑤1800÷75÷12 ⑥102×98+2×102 ⑦600÷15+600÷25 ⑧120×[(815-540)÷5]
22.38+7.02-19.38 73.2÷4÷25 85.7-15.6-4.4
125×(8+4)×25 645+650÷13-132 480÷[234-(152+34)]
48+8.5-3.8 6300÷25÷4 96×[(228-103)÷25]
102×26 98.5-(75.6+8.5) 66×25-25×26
①8.47+12.53-1.2 ②50-19.8-20.2 ③19.4+4.58+5.42
55.6+17.2+12.8+14.4 312×4+188×4 (169+231) ÷25÷4
76.7-33.3-16.7 125+(8+4) ×25 3900÷[(178-128)×39]
13.64+6.73+7.36
99×45
13.64-(3.28+2.64)
5.19-2.27-2.73
(125+2)×8
31.5+2.18-11.5+2.82
20-5.28-4.72
5.01-1.9+4.99
25×37+35×37
98×12÷21
2.3+5.4+8.7+3.6=( ◯ )◯( ◯ )