tính
30:{175:[335-(135+37.5)]}
25.17-(23-20)3
Tính
a) 30: {175:[335-(135+37.5)]}
b)25.17-(23-20)3
c)3.82- [ 4.(12-7)2 ]
4, -5/6 - 26/5 . 1/13
5, (19/23 - 22/46) . 23/16
6, (3/4 . - 5/7) . (20/9 . - 14/15)
Tinh bang cach hop li : luy~thua` so^
A,7.8.39+56.30+14.4.31
B,175+35-275+100
C,350:7+140:7+7:7
D,25.17+23.32
a) 47 + ( -115 ) -47 - ( -15 )
b) (-5) . (-7) . (-20) . (-3)
c) 120 - [ 50 - ( 12-22 )]
d) 108 - 15 + 25 . 3 - 72 : 23
e) ( 43 -863 ) - ( 137 - 57 )
g) 217 - [ -43 +217 - (-23)]
f) ( -23 ) + 175 + 23 + (-75)
h) 193 - ( 153 - 7.32 )
j) 175 - ( 3.52 - 5.32 )
Bài 2: Thực hiện phép tính (tính hợp lí nếu có thể) a, 4 . 52 – 18 : 32 b, 32. 22 - 32 . 19 c, 24 . 5 - [131- (13 - 4)2] d, 100: {250 : [450 - (4 . 53 – 22 . 25)]} e, 23 . 15 – [115 - (12 - 5)2] f, 30.{175 : [355 - (135 + 37 . 5)]} g, 5871: [928 – ( 247 - 82) . 5] + 21750 |
30 :{ 175 :[ 355 - ( 135 + 37. 5] }
30. [175 : [ 355 - ( 135 +37 . 5)}] Đề bài đó mn ;-;
tính nhanh
a/[25-(-75)]+32-(32+55)
b/25.17.(-4).125.(-8)
c/(-14).9-13.(-9)
d/37.90-37.(-10)
e/29.(100-47)+85.(47-29)
f/47.(23+50)-23.(47+50)
g/45-5.(17+9)-17.(-15)
h/(-8).(-25)+52.23