①6.45-2.74+3.6

②45.36+(83.4-15.07)

③67.39-(12.67+17.39)

④4.5+3.8+15.5

⑤35.62-8.38-5.62

⑥2.06+5.42+3.94+2.58

①4.15﹣3.24+9.85﹣6.76

②3.2×4.6+3.2×5.4

③（8+0.8）×1.25

④（15.4﹣7.8）×3.5

⑤1.25×4×2.5×0.8

⑥0.32×9+0.32

1-0.09=    0.45×101=    2÷0.02=    0.25×0.7×0.4=

                =        2.72+3-2.72+3=

①32+6.4+68+3.6

②10.27+0.4-8.27

③18.51-9.03-0.97

④64.3-18.75+15.7-11.25

⑤7.41-(2.96+3.04)

⑥4.28+2.08+3.62