人教版数学五年级上册第一单元复习及练习ppt课件合集：小数乘法.ppt

小学五年级数学（上册）复习及练习课件,第一单元：小数乘法,小学五年级数学（上册）,6.2,3,328,2.5,18,72,7.2,100,100,9.6,38.4,整数,积,.,100.8,12.15,3600,36,36,3.6,15.64=62.4（元）答：妈妈花了62.4元钱。,小学五年级数学（上册）,420,1.2,26,4.12,7,6.3,1000,100,2.128,10,1000,2128,1000,两位,四位,小数点,小数点,因数,右边,小数点,8.84,2.414,2.438,1.8,12.192,2.0128,54.567,1.752.5=4.375（km）答：能飞行4.375km,0.282.03=0.5684（m2）答:面积是0.5684 m2,.,5,9,2,1,8,6,9,1,1,0,1,小学五年级数学（上册）,两,两,四,0,小数点,0.0864,0.,0.0,1.26,0.0036,3,4.5,7.5,12.5,0.96,1.44,0.288,2.28,大,小,2.51.3=3.25(dm2),0.120.12=0.0144(m2),6.520.5=133.25(km)133.25120答：中途不需要加油。,2.7,4.4,44,2.7,0.44,0.27,0.044,2.7,0.044,0.27,0.44,0.027,小学五年级数学（上册）,B,C,B,A,0.2 4 3.6 2 4 8 1 4 4 7 2 0.8 6 8 8,3.6 2 0.2 4 1 4 4 8 7 2 4 0.8 6 8 8,验算：,21.8 1.6 1 3 0 8 2 1 8 3 4.8 8,400 4.15=1660(米/分)答：羚羊的速度是1660米/分。,32.6 1.6=52.16(kg)52.16-32.6=19.56(kg)答：袋鼠贝贝的重52.16kg，比袋鼠宝宝重19.56kg。,8.2 73.1=599.42（答案不唯一）,1.3 2.78=3.614（答案不唯一）,小学五年级数学（上册）,36.96,3.696,0.03696,0.3696,4.98,2.686,0.0054,2.375,2.5 6.88=17.2(dm)=1.72(m)答：犯罪嫌疑人的身高大约是1.72m。,0.008 10.5=0.084(千瓦时)0.084 30=2.52(千瓦时)答：要浪费2.52千瓦时电。,19.2,23.76,8.88,37,88.84,11.16,小学五年级数学（上册）,40,40.0,39.98,四,1.094,3.85,1.5,5.775,5.78,十分,百分,7.5 4.3 2 2 5 3 0 0 3 2.2 5,32.3,8.2 0.9 4 1 8 8 7 5 2 7.7 0 8,7.7,1.1 2 7.6 6 7 2 7 8 4 8.5 1 2,8.51,1.7 8 0.2 4 7 1 2 3 5 6 0.4 2 7 2,0.43,B,A,53.91.0657.1（km）答：圣哥达隧道全长57.1km。,12.33.543（m）答:这条飞鱼3.5秒可飞行43m.,最小:1.955最大:2.004,小学五年级数学（上册）,7.8,5.6,2.5,0.4,3.8,6.2,8,A,C,交换,结合,分配,=0.2540.9=10.9=0.9,=81.254.23=104.23=42.3,=0.56(1001)=0.561000.561=55.44,=3.2(2.77.3)=3.210=32,=0.2540.250.4=10.1=1.1,=0.68(991)=0.68100=68,(1.53.5)24120(元)答：一共需要120元钱。,1.2580313100(L)答：可制造3100L氧气。,4.70.354.70.424.70.234.7(0.350.420.23)4.714.7,小学五年级数学（上册）,16,够,33,15,不够,58.5248.8+28.6194.4(元)194.4200 够了或58.5不到60,58.52不到120,48.8不到50,28.6不到30，总共不超过120+50+30200，够了。,750.36=27(km)161.5=24(km)2427 1.5小时不能到单位。,9.17.2=65.52(m2)0.80.15500=60(m2)65.5260 不够,2.126.22+1.52=22.6(元)22.620 不够 或2.12 2.124 6.26 6.2212 1.21 1.2554+12+5=21(元)2120 不够,1袋大米不到35元,2袋不到70元;1kg鱼不到10元,1.8kg鱼不到18元;再买1kg10元的苹果,总共不超过70181098(元),100元够了.1袋大米超过34元,2袋大米超过38元;1kg鱼超过9 元,1.8kg鱼就超过91.816.2(元);如果买2kg苹果,总共超过6816.220104.2(元),100元不够.,小学五年级数学（上册）,5(52)1.59.5(元)答：应交停车费9.5元。,(7830)1.5518.92(元)答：需交18.92元的上网费。,0.6 4828.8(元)答：应交28.8元电费。,0.6 50(7250)0.8548.7(元)答：应交48.7元电费。,25.5(485)2.5133(元)答：一共需要133元钱。,8(163)1.527.5(元)答：他应该付给司机27.5元钱。,10(55001000)5001.826.2(元)答：需要快递费26.2元钱。,小学五年级数学（上册）,C,B,B,4.3898=4.38(100-2)=4.381004.382=438-8.76=429.24,3.62.40.08=3.6+0.192=3.792,0.2580.41.25=(0.250.4)(81.25)=0.110=1,1.131.561.76(亿件)答：2016年“双12”共揽收快递包裹1.76亿件。,6.20.3215=1.4(km)答：乐乐还要滑1.4km才能到达终点。,1盒牛奶不到3元,4盒牛奶不到12元;1瓶果汁不到6元;1盒饼干不到10元,2盒饼干不到20 元;1条毛巾不到8元;总共不超过12620846(元)50 元够买这些商品.,2.584.5(128)38(元)答:应缴纳水费38元钱。,