28×730+73×720
24×56+48×22
36×98+72
999×778+ 333×666
2.5+2.05= 7-0.3= 3.04×100= 4.5×2=
9.2+10.8= 8.2-1.7= 1.3×4= 28.6÷1000×100=
0.8= 0.37= 0.009=
0.51= 0.756= 0.033=
0.2 1.65 2.6 3.7
①3.9+4.08+3.92+1.1 ② 85.7- (15.3-4.8)
③940×[128-(154-31)] ④ 3200÷4÷25
101×87 77+2.7+2.3+23 169-25-25-50 10.75+1.88-9.25
360÷30720÷60 800-432÷6×9800-432÷(6×9)
﹣5,+3,﹣3.5,0.75,﹣