2.5×0.3×0.4={#blank#}1{#/blank#}

8.1+0.9=    0.2×0.4=    9.1÷0.7=    1.2×0.99×8=

3.57-0.7=    4.5÷0.45=    3.8×0.1=    3.8×8.2+3.8×1.8=

7.51×0.25×0.4

①4920÷24-17×12

②0.25 ×6.7×4

③ × － ÷

④9.43－（1.74＋1.43）

⑤

⑥ ÷[（ ＋ ）×2]

(7.5+2.5×2)×1.4                   1.25×3.48×0.08÷0.1 

8.7+1.3-0.65+0.35                3.7×10.3-3.7×0.3 

3.45×102                      (1.72+1.72+1.72+1.72)×2.5

3.17+0.83×1.6              70.8×0.27+7.08×7.3

(4.3-0.5)×0.125