小学数学五级上册简便计算练习(答案卷) .doc
《小学数学五级上册简便计算练习(答案卷) .doc》由会员分享,可在线阅读,更多相关《小学数学五级上册简便计算练习(答案卷) .doc(4页珍藏版)》请在三一文库上搜索。
1、小学数学五年级上册简便计算练习(答案卷)一、归类练习:(带题稍难,其他题都是基础题,必须掌握。)3.290.732.27 3.290.732.27 7.52.57.52.5=3.29(0.732.27) =3.29(0.732.27) =(7.57.5)(2.52.5)=3.293 =3.293 =05=6.29 =0.29 =5(加法结合律) (减法的性质) (同级运算交换)7.3253.293.325 7.325(5.3251.7) 7.325(5.3251.7) =7.3253.3253.29 =7.3255.3251.7 =7.3255.3251.7=43.29 =21.7 =21.7
2、=0.71 =0.3 =3.7(减法交换) (减法的性质) (前面减号,脱括号变符号)3.290.732.292.27 3.290.254 0.1258.8 =(3.292.29)(0.732.27) =3.29(0.254)=0.12581.1=13 =3.291 =11.1=4 =3.29 =1.1(同级运算交换) (乘法结合律) (先拆数,乘法结合律)0.250.28 0.1253.22.5 3510.2=0.2540.07 =(0.1258)(0.42.5)=35(100.2)=10.07 =11 =3510350.2=0.07 =1 =3507(先拆数,乘法结合律) (拆数,乘法结合
3、律) =357 (拆数,乘法分配律)0.2540.254 3.59.93.5993.5 =(0.250.25)(44)=3.5(100.1)=3.5(991)=116 =3.5103.50.1 =3.5100=16 =350.35 =350(同级运算交换) =34.65 (乘法分配律) (拆数,乘法分配律)3.51013.5 3.59.93.50.1 3.52.7350.73=3.5(1011) =3.5(9.90.1) =3.52.73.57.3=3.5100 =3.510 =3.5(2.77.3)=350 =35 =3.510(乘法分配律) (乘法分配律) =35 (先利用积不变的规律转化
4、,然后再用乘法分配律)3.52.73.50.7 (325.6)0.8 3.50.60.50.6=3.5(2.70.7) =320.85.60.8=(3.50.5)0.6=3.52 =407 =30.6=7 =47 =5(乘法分配律) (后2题类似分配律,但只适用于(ab)c和(ab)c,而a(bc)和a(bc)不能用。)4.91.4 70.254 70.125 =4.9(70.2) =7(0.254) =78=4.970.2 =71 =56=0.70.2 =7 (乘除法转化规律,转化时=3.5 符号相反,转化前后的2数(拆数,除法的性质) (除法的性质) 相乘得1。)7.35(7.350.25
5、) 7.35(7.350.25)=7.357.350.25 =7.357.350.25=10.25 =10.25=4 =0.25 (除法的性质) (前面是除号,脱括号符号相反)二、混合练习:3.070.381.62 1.293.72.716.3 82.451.55=3.07(0.381.62)=(1.292.71)(3.76.3) =8(2.451.55)=3.072 =410 =84=1.07 =14 =4(减法的性质) (加法交换律和加法结合律) (减法的性质)3.251.790.591.75 23.40.813.47.2 0.32403=(3.251.75)(1.790.59) =(23
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- 小学数学五级上册简便计算练习答案卷 小学 数学 上册 简便 计算 练习 答案
链接地址:https://www.31doc.com/p-5183638.html