《小数数学题:简便计算11道练习题及参考答案A7》由会员分享,可在线阅读,更多相关《小数数学题:简便计算11道练习题及参考答案A7(2页珍藏版)》请在金锄头文库上搜索。
1、简便计算练习题(1)147+59+141+253 (2)470-122-12(3)251104 (4)10177-77(5)865125 (6)12525768(7)1084-421-211-68 (8)4886+4883+488(9)2226+33396 (10)18(1/41+2/18)41(11)270+562+230+71+638+429参考答案:(1)147+59+141+253 =147+253+59+141 =400+200 =600 (2)470-122-12=470-(122+12)=470-300 =170(3)251104 =254110 =100110 =11000 (
2、4)10177-77 =10177-771 =(101-1)77=7700(5)865125 =812565 =100065 =65000 (6)12525768=125825419 =100010019=1900000(7)1084-421-211-68 =1084-(421+211+68) =1084-700 =384 (8)4886+4883+488=488(6+3+1)=48810=48800(9)2226+33396 =3334+33396 =333(4+96) =333100 =33300(10)18(1/41+2/18)41=1841(1/41+2/18)=1841/41+18412/18=18+82=100(11)270+562+230+71+638+429=270+230+(562+638)+(71+429)=500+1200+500=2200