7.25的21倍是{#blank#}1{#/blank#}？

34个0.48是{#blank#}2{#/blank#}？

1.4×0.5×0.8＝{#blank#}1{#/blank#}

1.25×2×0.4＝{#blank#}2{#/blank#}

2.5×0.4×1.6＝{#blank#}3{#/blank#}

3.2×1.5×2＝{#blank#}4{#/blank#}

1.2×0.5×0.5＝{#blank#}5{#/blank#}

0.2×0.2×0.2＝{#blank#}6{#/blank#}

4.4+3.5=      150×4=        6.78+0.23=     10-6.5+3.5=

7.9×100=     60×50=        287-199=       0.3×125×8=

1-0.03=       927÷9=        60÷100=       6.3×99+6.3=

3.3÷0.3＝          4×0.25＝     1.65+0.25＝       7.7﹣1.1=

6.36﹣2.6＝      25÷5＝      5×5÷5×5        1.7+3.3×0.2

0.68×40=                                                 *4.5×1.7=

3.9×0.56≈        (得数保留一位小数)            7.05×0.68≈               (得数精确到百分位)