几个英语题，大家帮帮忙做下
1.如果要写出所有的three-digit编号与太阳的figeres出现在每一个数字,arrane相当于从大到小的,那已经是第十数。
2.把等边三角形与正六边形分成小三角形，可见：正六边形面积分之大三角形面积=三分之二
立成算式：
正六边形面积=大三角面积除以三分之二=36除以三分之二=54平方厘米
3.首先,我们来算一算两种不同的包装的钢笔单价:第一种:51÷5=10.2元 第二种:72÷8=9元 通过以上比较, 第二种的价格相对便宜,如果都按那么49支就应当买7包,72×7=504元
如果都用第一种买法,则要卖49支就需要买11包,51×11=565元
以上两种买法,都存在问题,买的支数都超出了49支,在理财方面存在无必要的浪费.那么如果两种都买,总和怎样可能会出现恰好买49支笔.
我们来想,如果买一盒A种笔是5支,两盒式10支,三盒式15支.......发现买若干盒,总支数的个位数字总是0或5,所以买B种的总指数的个位就对应是9或4,讨论买B种若干盒总指数会出现个位是9吗 8是个偶数,任何数与偶数相乘结果都是偶数,各位都是偶数,所以各位不可能出现9,这样我们排除,各位是9,目标锁定:8乘以几的积个位是4,8×3=24 8×8=64
这样我们就利用策略8×3+5×5=49(支) 花钱应是:72×3+51×5=471元。
可还有最佳方案，最后算出来等于462元。
4.解设全班学生一共有X人 X-（五分之x+七分之二x+2）=五分之3x-5
2):三十五分之18x-2=五分之3x-5 3)； 三十五分之18x-三十五分之21x=-5+2 4）：负三十五分之3x=负3 x= 负三分之三十五乘负3 5）：x=35答全班有35人。
希望能帮到你！
1.what's the weather like on monday? It's sunny
2.who has the ball at the beginning? Tom has
3.does jeff get the ball? No, he doesn't
4.how does tom feel when the vollsyball hiats his bose?Tom is a little angry
5.how does class 1 feel at the end ? class 1 wins the game. So they must be happy
67. Mr. Smith was hungry
68. B
69. Don't be
71. How does
72. What does
73~77 DEAGF
78.e
79. orks
80 t
81 hinese
82 he
83 oo
84 o
85 re
书面表达还要？看不清
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