(1)18×50<180×50 (2)2098000>298000(3)36×80=18×160 (4)48000000平方米=48平方千米.故答案为:<、>、=、=. (1)一个因数不变时,另一个因数越大,则积越大,判断出两个算式的大小关系即可.(2)按照整数比较大小的方法判断即可;(3)根据积不变的规律判断即可.(4)首先根据1平方千米=1000000平方米,...
48×53+48×48-48=48×(53+48-1).___(判断对错) 扫码下载作业帮搜索答疑一搜即得 答案解析 查看更多优质解析 解答一 举报 48×53+48×48-48=48×(53+48-1)故答案为:√. 本题运用了乘法分配律,将48提出来,式子的左边即可转化为右边,等式是正确的. 本题考点:运算定律与简便运算 考点点评: 本题...
According to previous reports, the resident bought 50,000 tickets with the same numbers at lottery stations in Nanchang for the "Happy 8" seven-number game on December 2. That same night, the lottery was drawn, and...
We drink too much, spend too recklessly, laugh too little, drive too fast, get too angry tooquickly, stay up too late, get up too tired, read too little, watch TV too much, and pray tooseldom. 我们喝得太多,花钱大手大脚,笑得太少,开车太快,易...
The singer’s music video ___ nearly 9 million times since it was posted on the Internet four weeks ago. A. viewed B. was viewed C. has viewed D. has been viewed 试题答案 在线课程 练习册系列答案 暑假衔接教材期末暑假预习武汉出版社系列答案 假期...
一篇英语小短文.根据图意,用所给的提示词写一篇约50个词的小短文.提示词:one morning,Jack,look over,cold,medicine,three times,water,rest,thank,night,better.
=9×(50+1)=9×50+9×1=9×50+9所以答案是9.故答案为:7,9. ①把7×89运用乘法的分配律进行解答即7×89=7×(90-1)=7×90-7×1,由此可知答案.②把9×51运用乘法的分配律进行解答,9×51=9×(50+1)=9×50+9×1,由此可知答案. 本题考点:整数的乘法及应用 考点点评: 本题考查运算定律法...
在用油膜法估测油酸分子的大小的实验中,用到器材有:浓度为0.05%(体积分数)的油酸酒精溶液、最小刻度为0.1mL的量筒、盛有适量清水的45×50cm2浅盘、痱子粉、橡皮头滴管、玻璃板、