三、计算下面各题,怎样简便就怎样计算。(前两题每题2分,其余每题3分,共43分)
$31 - 24.5\div3.5 + 0.68$ $307\times10.1$ $48.4 + 2.78 + 51.6 - 0.48$
$6.5\times1.4 - 24.96\div7.8$ $1000\div32\div0.25\div1.25$ $(6.4 + 4.38\div0.73)\times3.4$
$(15 + 5.4)\div0.24 - 49$ $5.85\times8.9 + 11\times0.585$ $9.05 - 0.736\div(2.3\times0.4)$
$35 - (6.32 - 2.64)\div0.23$ $28.6\times10.1 - 2.86$ $46.7 - (6.7 + 6.86\div0.7)$
$19.35\div0.18\div4.3 - 5.9$ $(1.5 + 2.5)\times4.8\div1.6$ $8.5\times[3.64\div(7.1 - 1.9)]$
$31 - 24.5\div3.5 + 0.68$ $307\times10.1$ $48.4 + 2.78 + 51.6 - 0.48$
$6.5\times1.4 - 24.96\div7.8$ $1000\div32\div0.25\div1.25$ $(6.4 + 4.38\div0.73)\times3.4$
$(15 + 5.4)\div0.24 - 49$ $5.85\times8.9 + 11\times0.585$ $9.05 - 0.736\div(2.3\times0.4)$
$35 - (6.32 - 2.64)\div0.23$ $28.6\times10.1 - 2.86$ $46.7 - (6.7 + 6.86\div0.7)$
$19.35\div0.18\div4.3 - 5.9$ $(1.5 + 2.5)\times4.8\div1.6$ $8.5\times[3.64\div(7.1 - 1.9)]$
答案
24.68 3100.7 102.3
5.9 100 42.16
36 58.5 8.25
19 286 30.2
19.1 12 5.95
5.9 100 42.16
36 58.5 8.25
19 286 30.2
19.1 12 5.95
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