1、(苏教版)五年级数学上册练习十四教学课件3.50.006120.422043630.021.9（1.21.21.31.3）0.250.252 2、先说出各题的运算顺序，再计算。、先说出各题的运算顺序，再计算。2.552.551.71.70.590.591.51.50.590.590.910.912.52.50.250.2510103.43.4(0.5(0.50.30.34)4)12123.43.4（0.50.51.21.2）3.43.41.71.72 26.486.48(1.4(1.40.8)0.8)0.90.96.486.480.60.60.90.96.486.480.540.543 3、用
2、简便方法计算。、用简便方法计算。1.251.250.960.968 85.785.780.840.840.160.160.960.96(1.25(1.258)8)0.960.9610105.785.78(0.84(0.840.16)0.16)5.785.781 16.786.789.69.63 3、用简便方法计算。、用简便方法计算。1.271.273.93.90.73 0.73 6.16.1(1.271.270.73)0.73)(3.9(3.96.1)6.1)2 2101012120.250.2536360.250.254 49 91 19 99 93 3、用简便方法计算。、用简便方法计算。1
3、.281.288.68.60.280.288.68.68.68.6（1.281.280.280.28）8.68.61 18.68.68.68.68.68.62.42.41 12.42.40.020.022.42.4（1 10.020.02）2.42.41.021.022.42.40.0480.0482.4482.44817.417.418.818.818.6 18.6 17.217.2(17.417.418.6)18.6)(18.8(18.817.2)17.2)3636363672(72(秒秒)答：她们完成接力赛的总成绩是72秒。0.250.254004000.350.353535（千克）（千
4、克）1001000.350.35答：收的葵花子大约可以榨油35千克。连续减去两个数连续减去两个数,等于减去这两个数的和等于减去这两个数的和连续除以两个数连续除以两个数,等于除以这两个数的积等于除以这两个数的积S=ah=8.56=51(cm)S=ah2=53.942=51.97=9.85（m）S=(ab)h2=(12.6+7.4)5.82=205.82=58（m）444412.512.5 80804444(12.5(12.580)80)44441000100044000(44000(千克千克)44(44(吨吨)4.6米米59米米每层每层3.2米米再算除一楼外一共有几层再算除一楼外一共有几层先算除
5、一楼外一共有几米先算除一楼外一共有几米59594.64.6 54.4(54.4(米米)54.454.43.23.21717（层）（层）17171 1 1818（层）（层）答：这幢楼房一共有答：这幢楼房一共有1818层。层。面粉总价：面粉总价：8.54.80=40.8（元）（元）大米总价：大米总价：92.840.8=52（元）（元）大米数量：大米数量：524=13（千克）（千克）40.80元元52.00元元137 72 230302 2141460607474（元）（元）答：妈妈大约用去74元。6.96.92 229.829.82 22 2（6.96.929.829.8）2 236.736.773.473.4（元）（元）10010073.4=26.673.4=26.6（元）（元）24.624.626.626.635.435.4答：剩下的钱还够买一小袋大米。买一支圆珠笔和一支铅笔要用：(8.7+6.8)53.1（元）（元）买2支圆珠笔和2支铅笔要用：3.12 6.2（元）（元）圆珠笔的单价：8.76.2 2.5（元）（元）铅笔的单价：6.86.20.6（元）（元）
