1. 在$\square$里填数。
$1.74\times2.5 = 17.4\times\square$ $1.68\div0.7 = 168\div\square$
$9.2\div75 = \square\div0.75$ $0.76\times4.8 = \square\times0.048$
$1.74\times2.5 = 17.4\times\square$ $1.68\div0.7 = 168\div\square$
$9.2\div75 = \square\div0.75$ $0.76\times4.8 = \square\times0.048$
答案:
2. 直接写出得数。
$1.9\times0.3 =$ $37\times0.3 =$ $1.05\div100 =$
$4\div0.2 =$ $2.56\div0.8 =$ $13\div4 =$
$12\div5 =$ $0.25\times0.8 =$ $10\div0.01 =$
$1.9\times0.3 =$ $37\times0.3 =$ $1.05\div100 =$
$4\div0.2 =$ $2.56\div0.8 =$ $13\div4 =$
$12\div5 =$ $0.25\times0.8 =$ $10\div0.01 =$
答案:
3. 列竖式计算下列各题。
$0.056\times0.15$(得数保留两位小数) $1.87\div3.3$(得数精确到百分位)
$3.03\times1.05$ $518.5\div0.17$
$0.056\times0.15$(得数保留两位小数) $1.87\div3.3$(得数精确到百分位)
$3.03\times1.05$ $518.5\div0.17$
答案:
4. 能简便的用简便方法计算。
$0.24\times1.2\times150$ $0.8\times0.9\div0.8\times0.9$ $9.9\times4.3$
$8.12\times98 + 8.12\times2$ $6.4\times(0.125 + 12.5)$ $4.2\times75\div25$
$0.24\times1.2\times150$ $0.8\times0.9\div0.8\times0.9$ $9.9\times4.3$
$8.12\times98 + 8.12\times2$ $6.4\times(0.125 + 12.5)$ $4.2\times75\div25$
答案:
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