a,32.(-39+16.(-22))
=32.(-39+-352)
=32.(-391)
=-12512
b,44.(-36)+22.(-28)
=22.2.(-36)+22.(-28)
=22.(-72)+22.(-28)
=22.(-72+-28)
=22.(-100)
=-2200
-1911-(1234-1911)
156.72+28.156
32.(-39)+16.(-22)
-1945-(567-1945)
184.33+67.184
44.(-36)+22.(-28)
Bài 1.
a,-25.72+25.21-49.25
b,35(14-23)-23(14-35)
c,-25.21+25.72+49.25
d,156.72+28*156
e,32.(-39)+16.(-22)
f,184.33+67.184
g,44.(-36)+22.(-28)
Bài 1: Tính một cách hợp lý
6/ 27(13-16) - 16(13 - 27)
7/ -1911 - (1234 - 1991)
8/ 156.72 + 28 . 156
9/ 32 . (-39) + 16 . (-22)
10/ -1945 - (567 - 1945)
11/ 184. 33 + 67. 184
12/ 44.(-36) + 22 . (-28)
BT1 Thực hiện phép tính (tính nhanh có thể ):
1, 27.(13-16)-16.(13-27)=?
2 -1911-(1234-1911)=?
3 32.(-39)+16.(-22)=?
4 -(567-1945)-1945=?
5 44.(-36)+22.(-28)=?
Giúp mk với nha!!!!
Tính hợp lí nhất :
1/2155-(174+2155)+(-68+174)
2/-25.72+25.21-49.25
3/35(14-23)-23(14-35)
4/8154-(674+8154)+(-98+674)
5/-25.21+25.72+49.25
6/27(13-16)-16(13-27)
7/-1911-(1234-1911)
8/156.72+28.156
9/32.(-39)+16.(-22)
10/-1945-_567-1945
11/184.33+67.184
a2/44.(-36)+22.(-28)
Bài 1: Tính hợp lí nhất
1, 2155– (174 + 2155) + (-68 + 174)
2, -25 . 72 + 25 . 21 – 49 . 25
3, 35(14 –23) – 23(14–35)
4, 8154– (674 + 8154) + (–98 + 674) 5, – 25 . 21 + 25 . 72 + 49 . 25
6, 27(13 – 16) – 16(13 – 27)
7, –1911 – (1234 – 1911)
8, 156.72 + 28.156
9, 32.( -39) + 16.( –22)
10, –1945 – ( 567– 1945)
11, 184.33 + 67.184
12, 44.( –36) + 22.( –28)
44.(-36)+22.(-28)
Bài 1.Tính
a)\(\dfrac{4}{28}\)+\(\dfrac{12}{36}\) b)\(\dfrac{-12}{18}\)+\(\dfrac{15}{-21}\) c)\(\dfrac{14}{28}\)-\(\dfrac{-16}{32}\)-\(\dfrac{17}{51}\)
44.-36+22.-28
