6B_Bai 15: Quy tắc dấu ngoặc by Thầy Khoa Phương https://padlet.com/khoavnkg/dcmv4gmfew9yvyq 6b ngày 21/12/21 en-us 2021-12-21 02:01:48 UTC 2026-03-23 00:22:58 UTC hello@padlet.com https://padlet.net/icons/png/1f4d9.png Câu hỏi trang 67 Toán lớp 6 khoavnkg https://padlet.com/khoavnkg/dcmv4gmfew9yvyq/wish/1958108332 Viết tổng sau dưới dạng không có dấu ngoặc rồi tính giá trị của nó:

(-23) – 15 – (-23) + 5 + (-10).



]]> 2021-12-21 03:50:17 UTC https://padlet.com/khoavnkg/dcmv4gmfew9yvyq/wish/1958108332 khoavnkg https://padlet.com/khoavnkg/dcmv4gmfew9yvyq/wish/1958109840 Bỏ dấu ngoặc rồi tính các tổng sau:

a) (-385 + 210) + (385 - 217); 

b) (72 - 1 956) - (-1 956 + 28).

]]> 2021-12-21 03:51:33 UTC https://padlet.com/khoavnkg/dcmv4gmfew9yvyq/wish/1958109840 BÀI 3.21 khoavnkg https://padlet.com/khoavnkg/dcmv4gmfew9yvyq/wish/1958112512 Bỏ dấu ngoặc rồi tính:

a) (56 - 27) - (11 + 28 - 16); 

b) 28 + (19 - 28) - (32 - 57).

]]> 2021-12-21 03:53:53 UTC https://padlet.com/khoavnkg/dcmv4gmfew9yvyq/wish/1958112512 khoavnkg https://padlet.com/khoavnkg/dcmv4gmfew9yvyq/wish/1958113777 Tính một cách hợp lí:

a) 12 + 13 + 14 – 15 – 16 – 17;

b) (35 – 17) – (25 - 7 + 22).

]]> 2021-12-21 03:54:53 UTC https://padlet.com/khoavnkg/dcmv4gmfew9yvyq/wish/1958113777 khoavnkg https://padlet.com/khoavnkg/dcmv4gmfew9yvyq/wish/1958114517 Tính một cách hợp lí:

a) 21 - 22 + 23 - 24; 

b) 125 - (115 - 99).

]]> 2021-12-21 03:55:36 UTC https://padlet.com/khoavnkg/dcmv4gmfew9yvyq/wish/1958114517 Ngọc Hân https://padlet.com/khoavnkg/dcmv4gmfew9yvyq/wish/1958290511 (-23) – 15 – (-23) + 5 + (-10) 
= - 23 – 15 + 23 + 5 – 10
= (-23 + 23) + (-15 + 5 - 10)
= 0 + ( -10 - 10 )
= 0 + ( -20)
= 0 – 20
= -20.
]]> 2021-12-21 07:05:16 UTC https://padlet.com/khoavnkg/dcmv4gmfew9yvyq/wish/1958290511 Lê Như Quỳnh https://padlet.com/khoavnkg/dcmv4gmfew9yvyq/wish/1958291546 2021-12-21 07:06:19 UTC https://padlet.com/khoavnkg/dcmv4gmfew9yvyq/wish/1958291546 mỹ quyên myquenho https://padlet.com/khoavnkg/dcmv4gmfew9yvyq/wish/1958293870 2021-12-21 07:08:34 UTC https://padlet.com/khoavnkg/dcmv4gmfew9yvyq/wish/1958293870 Thanh Trúc https://padlet.com/khoavnkg/dcmv4gmfew9yvyq/wish/1958294646 2021-12-21 07:09:21 UTC https://padlet.com/khoavnkg/dcmv4gmfew9yvyq/wish/1958294646 Ngọc Hân https://padlet.com/khoavnkg/dcmv4gmfew9yvyq/wish/1958321580 a) (-385 + 210) + (385 - 217) 
= - 385 + 210 + 385 - 217 (bỏ ngoặc tròn)
= (- 385 + 385) – (217 – 210) 
= 0 – 7 
= - 7
]]> 2021-12-21 07:33:33 UTC https://padlet.com/khoavnkg/dcmv4gmfew9yvyq/wish/1958321580 Thanh Trúc https://padlet.com/khoavnkg/dcmv4gmfew9yvyq/wish/1958323712 a) (-385 + 210) + (385 - 217)

= - 385 + 210 + 385 - 217 (bỏ ngoặc tròn)

= (- 385 + 385) – (217 – 210)

= 0 – 7

= - 7

]]> 2021-12-21 07:35:33 UTC https://padlet.com/khoavnkg/dcmv4gmfew9yvyq/wish/1958323712 mỹ quyên myquenho https://padlet.com/khoavnkg/dcmv4gmfew9yvyq/wish/1958325457 2021-12-21 07:37:06 UTC https://padlet.com/khoavnkg/dcmv4gmfew9yvyq/wish/1958325457 tuấn huy https://padlet.com/khoavnkg/dcmv4gmfew9yvyq/wish/1958325612 2021-12-21 07:37:15 UTC https://padlet.com/khoavnkg/dcmv4gmfew9yvyq/wish/1958325612 Thanh Trúc https://padlet.com/khoavnkg/dcmv4gmfew9yvyq/wish/1958327422 b) (72 - 1 956) - (-1 956 + 28)
= 72 - 1 956 + 1 956 - 28 (bỏ ngoặc tròn)
= (1 956 – 1 956) + (72 – 28)
= 0 + 44
= 44

]]> 2021-12-21 07:38:46 UTC https://padlet.com/khoavnkg/dcmv4gmfew9yvyq/wish/1958327422 thanh khiết a ( -385+ 210) + ( 385 - 217) =385 + 210 + 385 - 2 17 ( bỏ ngoặc tròn = (- 385 + 385) - ( 217 -210) =0-7 = -7 https://padlet.com/khoavnkg/dcmv4gmfew9yvyq/wish/1958329772 2021-12-21 07:40:34 UTC https://padlet.com/khoavnkg/dcmv4gmfew9yvyq/wish/1958329772 mỹ quyên myquenho https://padlet.com/khoavnkg/dcmv4gmfew9yvyq/wish/1958332243 2021-12-21 07:42:30 UTC https://padlet.com/khoavnkg/dcmv4gmfew9yvyq/wish/1958332243 Ngọc Hân https://padlet.com/khoavnkg/dcmv4gmfew9yvyq/wish/1958332763 b) (72 - 1 956) - (-1 956 + 28)
= 72 - 1 956 + 1 956 - 28 
= (1 956 – 1 956) + (72 – 28)
= 0 + 44
= 44
]]> 2021-12-21 07:42:59 UTC https://padlet.com/khoavnkg/dcmv4gmfew9yvyq/wish/1958332763 Lê Như Quỳnh https://padlet.com/khoavnkg/dcmv4gmfew9yvyq/wish/1958344524 A) (56-27)-(11+28-16)
= 56-27-11-28+16
= 56-(27+11+28)+16
=56-66+16
=-10+16
=6
B) 28+(19-28)-(32-57)
= 28+19-28-32+57
=(28-28)+19-32+56
= 0-13+57=44]]> 2021-12-21 07:53:23 UTC https://padlet.com/khoavnkg/dcmv4gmfew9yvyq/wish/1958344524 Ngọc Hân https://padlet.com/khoavnkg/dcmv4gmfew9yvyq/wish/1958345611 2021-12-21 07:54:14 UTC https://padlet.com/khoavnkg/dcmv4gmfew9yvyq/wish/1958345611 Thanh Trúc https://padlet.com/khoavnkg/dcmv4gmfew9yvyq/wish/1958347605 a) 12 + 13 + 14 - 15 - 16 - 17
= (12 - 15) + (13 - 16) + (14 - 17)
= (-3) + (-3) + (-3)
= - (3 + 3 + 3)
= - 9

b) (35 - 17) - (25 - 7 + 22)
= 35 - 17 -25 + 7 - 22
= (35 - 25) - (17 - 7) – 22
= 10 - 10 – 22
= 0 – 22
= - 22.

]]> 2021-12-21 07:55:59 UTC https://padlet.com/khoavnkg/dcmv4gmfew9yvyq/wish/1958347605 mỹ quyên myquenho https://padlet.com/khoavnkg/dcmv4gmfew9yvyq/wish/1958354332 2021-12-21 08:01:36 UTC https://padlet.com/khoavnkg/dcmv4gmfew9yvyq/wish/1958354332 Ngọc Hân https://padlet.com/khoavnkg/dcmv4gmfew9yvyq/wish/1958356239 2021-12-21 08:03:14 UTC https://padlet.com/khoavnkg/dcmv4gmfew9yvyq/wish/1958356239 thanh khiết a 12 + 13 + 14 -1 5 -16 -17 =( 1 2-15) + (13-16) + ( 14- 17) = (-3) + (- 3) +(-3=9 https://padlet.com/khoavnkg/dcmv4gmfew9yvyq/wish/1958358611 2021-12-21 08:05:21 UTC https://padlet.com/khoavnkg/dcmv4gmfew9yvyq/wish/1958358611