tính
30:{175:[335-(135+37.50)]}
25.17-(23-20)3
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)
tính
30% : 130%
câu 1 : Thực hiện phép tính
1) 2 mũ 3 .15 - [115-(12-5) mũ 2]
2) 30:{175:[355- (135+37.5)]}
câu 2 :tìm x ,biết
1)0128-3(x+4)=23
2) 720:[41-(2x-50]=2 mũ 3 .5
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
tính nhanh:135+357+597-335-557-197
Tính nhanh:
135+357+597-335-557-197
= (135-335) + (357+597-557-197)
= (-200) + 200
= 0
135 + 357 + 597 - 335 - 557 - 197
= ( 135 - 335 ) + ( 357 + 597 - 557 - 197 )
= (-200) + 200
= 0
troll mình à
=135+357+597+(-335) + ( -557) +(-197)\
= 0
Tinh nhanh
135+357+597-335-557-197
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 )