( - 35 ) + 18 - 13 = - 17 - 13 = - 30
( - 35 ) + 18 - 13 = - 17 - 13 = - 30
tính
3/17 + -5/13 + -18/35 + 14/17 + 17/-35 + -8/13
a) 214 + [120-(214+120)]
b) (-321)-[(-321+35) -235 ]
c) (18+29)+(158-29-18)
d) (13-135+49)-(13+49)
g)18 . (-24) + 35 . 42 -18 . 76 + 35 . (-142)
h) 104 : (-13) - [ 56 - 220 : ( -4 )]
i)1010: {2500:[ 550 - (4 . 53 - 23 . 25) ]}
j) (72 + 32 . 42 )+(-145 ) + 45 -20230 + 12023
a,9/4-[-11}/-4
b, 7/8-3/-8-1/8
c,-5/21-25/21-[-1]/21
d, 18/24-35/-10
e, 3/7-11/14-19/28
g, 5/-{-2}/3-1/12
h, 3/17-{-5}/13-{-18}/35-14/17-17/{-35}-{-8}/13
28) 15/12+5/13-3/12-18/13
29) 13/25+6/41-38/25+35/41-1/2
30
Tính bằng cách hợp lí :
35 . 11 + 65 . 18 + 35 . 13 + 65 . 6
1:tính nhanh
A=-3^17[2^3+3^17]
B=3^17+-5^13+-18^35+14^17+17^-35
78-28+35+13-21-46+7-18=
nhớ viết cách làm luôn nhe
a/ 35 + (-74)+(-35)
b/ 70 - 105 + 35
c/ 27 - (-14) - 13
d/ -24 - (-27) + 18
e/ -13+ (-7+13) -16
f/ -32 - (19 - 32)+ 19 - 2017
g/ 48 - (35-16+48) + 35 +2016
h/ 555: 5 + 225 : 152