(4)甲、乙两数相乘,如果乙数增加3,积就增加240,已知乙数是甲数的8倍,求这两个数的积是多少?
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(5)要估计图中有多少粒黄豆,我的方法是:
(6)用简便方法计算
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700÷25 99×83 23×62+23×28+230
(7)请你用在本学期学习中累积的方法和经验探索出下面算式的计算结果:
1+2+1=( )
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1+2+3+2+1=( )
Users may use the contents or services of this article for personal s请你接着写一个:
……
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Users may use the contents or services of this article for personal s1+2+3+4+……+48+49+50+49+48+……+4+3+2+1=( )
参考答案
【A卷】 一、
(1)二百八十万; 284;(2)280070400; (3)>; <; =;(4)无数;
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(5)-240;
Users may use the contents or services of this article for personal (6)20; 15000; (7)30; 两;
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(8)4; 商不变;(9)直; 90;
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(10)红; 黄;
Users may use the contents or services of this article for personal s(11)长方形; 14;
Users may use the contents or services of this article for personal s(12)阅读与理解; 分析与解答; 回顾与反思; 二、
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(1)√;(2)√;(3)√;(4)×;(5)× 三、
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(1)B(2)C(3)A(4)B(5)C 四、
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Users may use the contents or services of this article for personal s1.直接写出得数
Users may use the contents or services of this article for personal s50; 1200; 9; 253;100; 302; 408; 0;
Users may use the contents or services of this article for personal s8; 3600; 285; 200002.竖式计算
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7038; 19600; 22; 52; 3.脱式计算 2300; 18; 4.简便运算
500; 17000; 4343; 6100; 168; 368; 五、画图略 六、
1. 6千米=6000米
6000÷15=400(米/分)
答:他骑摩托车的速度是400米/分. 2. 384÷12=32(个/分)
846÷18=47(个/分) 47个/分>32个/分 答:小青打字的速度快。 3. 36×12×6=2592(棵)
答:这块菜地一共能种2592棵白菜。 4. (243-12×4)÷13=15(页)
答:他平均每天要看15页。 5. 4×25×23=2300(瓶)
答:乐天超市共运会2300瓶牛奶。 6. 一套衣服多少元; 一共有多少套衣服;
(115+85)×52=10400(元)
答:买52套这样的衣服需要10400元。
【B卷】
(1)>
(2)84999; 75000 (3)45;
(4)甲数为:240÷3=80
乙数为:80÷8=10 两数的积:80×10=800
(5)把图片分成若干个大小相同的小长方形,数出其中一个小长方形里的豆子数,然后用豆子数乘小长方形的个数,所得的积就是所估计的豆子数. (6)28; 8217; 2300
(7)4; 9; 1+2+3+4+3+2+1=16; 2500版权申明 本文部分内容,包括文字、图片、以及设计等在网上搜集整理.版权为个人所有 This article includes some parts, including text, pictures, and design. Copyright is personal ownership. 用户可将本文地内容或服务用于个人学习、研究或欣赏,以及其他非商业性或非盈利性用途,但同时应遵守著作权法及其他相关法律地规定,不得侵犯本网站及相关权利人地合法权利.除此以外,将本文任何内容或服务用于其他用途时,须征得本人及相关权利人地书面许可,并支付报酬. Users may use the contents or services of this article for personal study, research or appreciation, and other non-commercial or non-profit purposes, but at the same time, they shall abide by the provisions of copyright law and other relevant laws, and shall not infringe upon the legitimate rights of this website and its relevant obligees. In addition, when any content or service of this article is used for other purposes, written permission and remuneration shall be obtained from the person concerned and the relevant obligee. 转载或引用本文内容必须是以新闻性或资料性公共免费信息为使用目地地合理、善意引用,不得对本文内容原意进行曲解、修改,并自负版权等法律责任.Reproduction or quotation of the content of this article must be reasonable and good-faith citation for the use of news or informative public free information. It shall not misinterpret or modify the original intention of the content of this article, and shall bear legal liability such as copyright.

