1 2 3 4 5 6 7 8 9只准用加号如何等于99

虽然看不到问题,但做过类似的,看看是下面的答案吗
4 3 8
9 5 1
2 7 6

1/5=0.2
5-0.2=4.8
5*4.8=24
所以正确答案就是:5*(5-1/5)=24.

Tomorrow_is_Children's Day.We don't go to school.I'mgoing to school.I'm going to school.I'm going to__early and__my homework in the morning.I'm going to the YongZhen__and buy some new_comic_with my firend in the_storebooks_.I'm going to there __,I'm going to _read_my new books.__are_are you gong to do tomorrow

climbed, old, older, food, mountain, sang, happy, saw, took, had

2*4=8
11-6=5
12/4=3

两种解法：1.第一图.按AD线切第一刀,然后将两块半圆重叠起来,此时BF线重叠切第二切,最后沿EC线重叠切第三刀,那么蛋糕分为4块72度与2块36度的蛋糕!OK分为五个人
2.第二图AB,CD,EF三刀切出来,也是分为4块72度与2块36度OK

friend
taller
younger
likes
play
weekend
going
office
collecting
happy

解题思路：因为题干中只有“8”和“3”两种数字，所以要把24分解为：24=3×8，又因为两个“3”和一个“8”，不论你怎么调试都不能得到一个因数“3”，所以把24=3×8变为24=8÷[1/3]，就可以得到一个算式：[1/3]=3-8÷3，因此，可以得出：8÷（3-8÷3），据此解答．

8÷（3-8÷3），
=8÷[1/3]，
=8×3，
=24；
故答案为：8÷（3-8÷3）．

点评：
本题考点： 填符号组算式．

考点点评： 本题关键是把24从变成两个因数想到转变为除以一个分数，然后调整得出结果为24的式子．

解题思路：首先搞清参与运算的数：-6，3，4，10；其次搞清选择的运算符号：加、减、乘三种运算方法；由此写出算式即可．

10-3×（-6）-4=24；
3×（-6+10+4）=24；
10-（-6×3+4）=24；
（答案还有多种，符合条件的答案即可）．

点评：
本题考点： 有理数的混合运算．

考点点评： 此题考查有理数的混合运算，注意数据的特点与运算符号之间的联系．

Jack is 12 yeahs __old___ . He has ___three_____ friends . They are Chen Jie , Amy , Mike . Sarah is 12 . She has long hair . Chen Jie likes playing the piano very much . Amy is 13 . She is ___one__ y...

[1]+[7]=[8]
[9]-[6]=[3]
[4]x[5]=[20]

（did,worker,does,tired,goes,was,sad,often,cleaned,play,works,cooked,played,went,playing)
My good friend is Ann.She _goes___ to work by motor cycle every day.She _works______in a factory.She is a good _worker___ .She often __does__ housework at home,too.Yesterday,she came back form work.She _cooked____ dinner for us .After dinner,she _did____ the dishes and then _cleaned_____ the house .After doing that,she was _tired____.She had a rest.Then she _played_____ the piano .She can __play____ it well.At about 11:00,she went to bed.
选择题
( D )Why are you looking at _____ like that?
A.I B.mine C.my D.me
根据上下文,完成下列对话.
A：Where _were____ you last week?
B:I ___was______ on a farm __with_______ my family.
A:What ____did____ you do on the farm?
B:We __planted___ trees and _picked____ up carrits.
A:What _else____ did you do?
B:We __fed____ coes.It __was____ fun!
A:Wonderful!I __plan_____ to go to the farm,too.

10-3×（-6）-4=24；
3×（-6+10+4）=24；
10-（-6×3+4）=24；
（答案还有多种，符合条件的答案即可）．

解题思路：把工人总数看作单位“1”，3个工人只准合用一个菜碗，也就是每个工人只准合用1÷3=[1/3]菜碗，4个工人只准合用一个汤碗，也就是每个工人只准合用1÷4=[1/4]个汤碗，那么每个人就用1+[1/3]+

1

4

=1[7/12]个碗，依据分数除法意义即可解答．

76÷（1+[1/3]+
1
4）
=76÷1[7/12]
=48（个）
答：工地共有48个工人在劳动．

点评：
本题考点： 分数四则复合应用题．

考点点评： 分数除法意义是解答本题的依据，关键是求出每个人用碗个数．

miss wu( went ) to guangzhou( last ) summer holiday.she saw some( tall ) buildings in the city.last week,she was very ( busy )
she ( cooked ) lunch for her family.she helpsd grandma( do ) housework.she went (swimming )with her cousins .she fished in the ( lake ).the summer holiday was ( over ) .she ( had ) a good time.

1.by 2.learned 3.because 4.swimming 5.good 6.Beijing 7.China 8.hot 9.going 10.excited

936=182+754
963=218+745
792=138+645
972=314+658
981=324+657
918=275+643

2+9-4=7
8-5+3=6

(10-6)*2*3

You are very skilled.
You play basktball very good.
What a good shot.
You have good shot.

把9块钻石编1至9号,
把1至6号放到天平两边：（1）如一样重；把7、8号放到天平两边：A,如一样重,则9号是,B,如不一样重,则把7、9放到天平两边,如一样重,则8是,如不一样重,则7是.
（2）如不一样重,一边的三块按7、8、9号一样操作.