例：0.36=4×0.09   0.36=1.2×0.3   0.36=0.18×2

4.5

36×2.5={#blank#}1{#/blank#}

2.5×0.4=        0.5×0.2=         3.3×0.3=        1.25×8 =

0.64×1000=     5.38×0=         1.2×0.5=        0.08×50 =

①1.28+2.72=       1-0.9=           0.32÷0.8=       0.8×5=

②0.9×0.1=         3.11＋2.22=      10+0.37=       12.5＋12.5×7=

③0.25×4=          0.16×4=

210÷7=        12.25-0.5=         -0.5=          0.77+123%=

25×0.4=        - =             × =          + =