Question

Hai người thợ cưa một cây gỗ dài 2,8m thành những đoạn bằng nhau, mỗi đoạn dài 4dm. Hỏi họ làm hết mấy giờ ? Biết thời gian cưa mỗi mạch cưa hết 20 phút.

Answer 1

37 gio

Answer 2

37 gio

Answer 3

37 giờ là sai

Answer 4

37 giờ tớ lm bài này rồi

Answer 5

Họ làm 37 giờ

tk mk nha

mk làm rồi

thank nhiều

Answer 6

Đổi 4dm = 0,4m

Có số mạch cưa là:

2,8 : 0,4 - 1 = 6 ( mạch cưa )

Họ làm hết số giờ là:

20 x 6 = 120 ( phút ) 

120 phút = 2 giờ

Vậy họ làm hết 2 giờ. 

nha! Cảm ơn trước!

Answer 7

đừng theo nhau nữa!

Answer 8

uk hnay cô giáo minhfm  chữa là 2 giờ

Answer 9

37 gio la sai

Answer 10

ngu như chó 2 giớ mới đúng

Answer 11

2 gờ mới đúng 100%

Answer 12

37 giờ là sai bét

Answer 13

37 là sai vì trong toán sai mà đời thực cũng sai, ai lai cưa đến 37 giờ

Answer 14

2 gio nha

Answer 15

họ làm hết 2 giờ

Answer 16

2 người thợ làm hết 2 giờ

ai kết bạn ko tớ 

Answer 17

2 giờ bn nhé

Answer 18

các bạn ơi 2 giờ là đúng đó 100% luôn

Answer 19

phai cua 2 gio dung 100000000000000%

Answer 20

theo minh la 2 gio do bn

Answer 21

2 giờ đấy

Answer 22

2gio minh vua thi xong

Answer 23

2 gio la dung

Answer 24

Mình vừa thi xong. Đáp án phải là 2 giờ. 100% đấy.
 

Answer 25

2 GIO DAY 1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000%

Answer 26

làm kiểu gì ra 2 giờ vậy ?

Answer 27

2 giờ nha bn

Answer 28

mình đảm bảo 2 giờ là đúng nha bạn

Answer 29

2 giờ đấy nha.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a.a 10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000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Answer 30

2 gio day dung 100/1000 luon