50+50+80+20+60+55+44+1+40=400 nha

\(50+50+80+20+60+55+44+1+40\)

\(=\left(50+50\right)+\left(80+20\right)+\left(60+40\right)+\left(55+44+1\right)\)

\(=100+100+100+100\)

\(=100.4\)

\(=400\)

nho gui tin nhan do

ok 

ko ghi lại đề 

= ( 50 + 50 ) + ( 80 + 20 ) + ( 60 + 40 ) + ( 55 + 44 + 1 ) 

=      100              100              100             100

=    100 x 4 

= 400

= 550

NHo nhe !!!

10 + 20 + 30+40+50+60+70+80+90

=(10+90) + (20+80)+(30+70) + (40+60) + 50

=100+100+100+100+50

=400+50

=450

10 + 20 + 30 + 40 + 50 + 60 + 70 + 80 + 90 + 100

= ( 10 + 100 ) + ( 20 + 90 ) + ( 30 + 80 ) + ( 40 + 70 ) + ( 50 + 60 ) 

= 110 x 5 = 550

\(10+20+30+40+50+60+70+80+90+100\)

\(=\left(10+90\right)+\left(20+80\right)+\left(30+70\right)+\left(40+60\right)+\left(50+100\right)\)

\(=100+100+100+100+150\)

\(=550\)

10 + 20 + 30 + 40 + 50 +60 + 70 + 80 + 90 +100

= (10+90) + (20 + 80 ) + ( 30 + 70 ) + ( 40 + 60 )  +100 + 50

= 100 + 100 + 100 + 100 +100 + 50

= 500 + 50

= 550

\(10+20+30+40+50+60+70+80+90+100\)

\(=\left(10+90\right)+\left(20+80\right)+\left(30+70\right)+\left(40+60\right)+50+100\)

\(=10+10+10+10+50+100\)

\(=10.4+50+100\)

\(=40+50+100\)

\(=90+100\)

\(=190\)

Normally, when I have free time, I usually play sports, watch tv, surf webs and read books. After learning stressful hours, such activities help me entertain and relax. And playing sport is the free time activity I like best. Firstly, I like to play sport because it is really a healthy activity. You know, sports provide many benefits for our health. It can improve health and help us to be strong. In the addition, sport help us increase in statue and have a excellent body. Secondly, I like sports. I feel as dynamic as possible. Moreover, It makes me full of energy. Lastly, well, It is what I enjoy most when playing sports. That is sports can help us take up the community. We will knows a lot of people because of having the same interests in playing sports. Trust me, I was acquainting a lot of friends when I play sports. In short, I like to play sport because it provides many benefits for me. And you? What are activities do you like best in your free time?

I do quite a lot of sport actually. I play football mostly - on Wednesday nights and Sunday afternoon with a local team. I also play tennis and squash when I can but I don't really get the time to do them as well every week. I work quite hard at the moment, so I don't get a lot of free time unfortunately.

Normally, when I have free time, I usually play sports, watch tv, surf webs and read books. After learnt stressful hours , activities such as help me entertain and relax. And playing sport is the free time activity I like best. Firstly, I like to play sport because it is really a healthy activity . You knows, sports provides many benefits for our health. It can improve health and help us to be strong. Addition, sport help us increase in statue and have a excellent body. Secondly, I like sports. I fell as dynamic as possible. Moreover, It make me full of energy. Lastly, well, It is what I enjoy most when playing sports. That is sports can help us take up the community. We will knows a lot of peoples because of having the same interests in play sport. True me, I was acquainting a lot of friend when I play sports. In short, I like to play sport because it provides many benefits for me. And you? What are activities you like best in your free time?

47 + 50 + 3 + 100 + 20 + 80 + 40 + 60 + 10 + 90 = 500

nha bn k mk nha bn

thanks nhju mk k cho bn roj đó

500 nhé 

500 nha bn

Lời giải chi tiết:

Bài nay làm như thế này em nhé:

So sánh các số tròn chục, số nào có hàng chục càng lớn thì có giá trị càng lớn rồi điền dấu thích hợp.

20 > 10     40 < 80     90 > 60

30 < 40     80 > 40     60 < 90

50 < 70     40 = 40     90 = 90

>                <                   >

<                 >                  <

<                 =                   =

20 > 10  40 < 80  90 > 60               

30 < 40   80 > 40 60 < 90

50 < 70  40 = 40 90 = 90

20

40

60

80

100

120

kb minh nha

10+10=20

20+20=40

30+30=60

40+40=80

50+50=100

60+60=120

10 + 10 = 20

20 + 20 = 40

30 + 30 = 60

40 + 40 = 80

50 + 50 = 100

60 + 60 = 120

Tìm số chia trong phép chia 250 chia  cho 4 , dư 10 là :

A . 20

B . 60

C . 40

D . 80

đáp án là 60

Tìm  số chia trong phép chia 250 cho 4, dư là 10

a)20.           b) 40

c) 60.            d) 80