<div style="text-align: center;"><strong><font color="#ff0000">2014年人教版小学五年级数学整数乘法运算定律推广到小数专项训练题</font></strong></div><div><br></div><br><span style="font-weight:bold; ">一、</span><span style=" font-weight:bold; ">口算。</span><span style=" font-weight:bold; "></span><br><br><span style=" font-family: 宋体;">(1)0.5×0.2= (2)50×0.2= (3) 500×0.2=</span><span style=" font-family: 宋体;"></span><br><br><span style=" font-family: 宋体;">(4)2.4×4= (5)2.5×0.4= (6)0.25×40=</span><span style=" font-family: 宋体;"></span><br><br><span style=" font-family: 宋体;">(7)0.125×8= (8)12.5×8= (9)1.25×80=</span><br><br><span>2</span><span>、在括号里填上适当的数</span><span>。</span><br><br><span style=" font-family: 宋体;">(1)0.32=4×( ) (2)1.02=1+( ) (1)3.2=4×( ) </span><span style=" font-family: 宋体;"></span><br><br><span style=" font-family: 宋体;">(3)0.99=1-( ) (4)9.8=( )- ( ) </span><span style=" font-family: 宋体;"></span><br><br><span style=" font-weight:bold; ">二、运用运算定律填空。</span><br><br><span>0.4×2.1＝</span><span style=" text-decoration:underline ; "> </span><span>○0.4</span><br><br><span>(12.3×4)×2.5＝</span><span style=" text-decoration:underline ; "> </span><span>○(</span><span style=" text-decoration:underline ; "> </span><span>×2.5)</span><br><br><span>(8＋0.4)×25＝</span><span style=" text-decoration:underline ; "> </span><span>×25＋</span><span style=" text-decoration:underline ; "> </span><span>×25</span><br><br><span>9.8×124＝(</span><span style=" text-decoration:underline ; "> </span><span>－</span><span style=" text-decoration:underline ; "> </span><span>)×124＝</span><span style=" text-decoration:underline ; "> </span><span>×</span><span style=" text-decoration:underline ; "> </span><span>－</span><span style=" text-decoration:underline ; "> </span><span>×</span><span style=" text-decoration:underline ; "> </span><span style=" text-decoration:underline ; "></span><br><br><span style=" font-weight:bold; ">三、简便计算。</span><br><br><span>0.125×64 0.68×101 3.26×5.7－3.26×0.7</span><br><br><br><span>55.6×99＋55.6 1.25×3.2×25 </span><br><br><br><span>3.42×5.7＋4.3×3.42 8.75×11－8.75 </span><span style=" font-family: 宋体;">12.5×4.8</span><br><br><br><span style=" font-family: 宋体;">1.01×2.6 3.8×9.9 </span><span>19.625－(4.379＋9.625)</span><br><br><strong><span>四、</span><span>列竖式计算</span></strong><br><br><span>3.2×1.8= 1.05×62= 2.7×0.11=</span><br><br><br><span>0.12×0.18= 0.15×0.12= 2.7×1200=</span><br><br><span><strong>解决问题专项训练</strong></span><br><br><span>1、</span><span>游乐园的成人票每张4.5元，儿童票每张2.5元，成人票和儿童票各买12张需要多少钱?</span><br><br><span>2、</span><span>李叔叔买了25箱饮料，一箱有8盒，每盒1.7元，共需要多少钱？</span><br><br><span>3、</span><span>一台碾米机每小时可碾米 0. 8 吨, 4 台同样的碾米机 8. 5 小时可碾米多少吨？</span><br><br><span>4、</span><span>修一段公路,平均每天修 18. 5 千米, 修 15 天后还剩 9. 5 千米,这段公路长多少千米?</span><br><br><span>5、</span><span>射洪县出租车的收费标准是：3千米以内4元，超过3千米，每千米1.5元（不足1千米按1千米计算）。王叔叔乘了13.5千米，应该给多少车费呢?</span><span> </span><br><br><span>6、</span><span>某市电力公司为鼓励节约用电，采取按月分段计费的方法收取电费。50度以内的每度1.8元;超过50度的部分，每度2.2元。</span><br><br><span>（1）</span><span>小明家上月用电86度应该交多少电费？</span><br><br><span>（2）</span><span>小红家上月用电103度应该交多少电费？</span><br><br><span>7、五（1）班46名师生照集体照，照相馆的收费标准是：拍照一次，并送4张照片，收费15元，加印一张2.5元。现在要保证每人有一张照片，一共要付多少钱？</span><br> <br>
五年级上