50.75-(4.75+0.88) 35×102 66-42÷7×6
33×4×25 15.09+21.3+4.91+7.7 840÷[25×(81-77)]
(450+27)÷(21﹣18)
3.46+8.3+6.54+1.7
25×5+74×5+5
87﹣2.123﹣0.877
7.22﹣3.68+5.89
19.6+6.85+2.15+0.4
8.98﹣(2.75+3.6)
0.7+2.61.9+2.6
2.8+3.63.6+2.8
4-3.5+0.54-(3.5+0.5)
7.5-3.3+0.57.5-0.5+3.3