(135-7)×5-135×5+35
Tinh nhanh
Tính nhanh
a. B=5/6 -6/7+7/8-8/9+9/10-5/6+6/7+7/8+8/9
b. (2008-2/135+1/50) - (1-7/135+4/50) _ ( 5 + 5/135+3/50)
các bạn giúp mình nha
Tính nhanh:
5) 125. (−8). (−25). 9.4.1000 : 3
6) (−2) 3 . 13.125
7) 17. (38 − 5) − 38. (17 − 1)
8) (−41). 135 + 135. (−58) − 135
GIÚP VỚI. MIK CẦN GẤP!!!!!!
5) 125. (−8). (−25). 9.4.1000 : 3
=[125.(-8)].[(-25).4].(9:3).1000
=-1000.(-100).3.1000
=100000.3.1000
=300000.1000
=300000000
6) (−2)3 . 13.125
=-8.13.125
=(-8.125).13
=-1000.13
=-13000
7) 17. (38 − 5) − 38. (17 − 1)
=17 . 33 - 38 . 16
=561-608
=-47
8) (−41). 135 + 135. (−58) − 135
=(-41).135+135.(-58)+135.(-1)
=135.[-41+(-58)+(-1)]
=135.(-100)
=-13500
Tính nhanh
( 1 + 3 + 5 + 7 + ..... + 2001).(135 135.137 - 135.137 137)
Nhanh tick kkk
\(\left(1+3+5+7+........+2001\right)\cdot\left(135135\cdot137-135\cdot137137\right)\)
\(=\left(1+3+5+..........+2001\right)\cdot\left(18513495-18513495\right)\)
\(=\left(1+3+5+7+....+2001\right)\cdot0\)
\(=0\)
( 1 + 3 + 5 + 7 + ..... + 2001).(135 135.137 - 135.137 137)
= ( 1 + 3 + 5 + 7 + ..... + 2001).( 135 x 1001 x 137 - 135 x 137 x 1001 )
= ( 1 + 3 + 5 + 7 + ..... + 2001). 0
= 0
k mik nha
( 1 + 3 + 5 + 7 + ..... + 2001).(135 135.137 - 135.137 137)
=( 1 + 3 + 5 + 7 + ..... + 2001).( 135.1001.137 - 135.1001-137)
=( 1 + 3 + 5 + 7 + ..... + 2001). 0
= 0
Điền Đ, S
a) 135 - 35 : 5 = 100 : 5 = 20
b) 246 + 54 x 2 = 246 + 108 = 354
c) 135 - 35 : 5 = 135 - 7= 128
d) 246 + 54 x 2 = 300 x 2= 600
a) 135 - 35 : 5 = 100 : 5 = 20
b) 246 + 54 x 2 = 246 + 108 = 354
c) 135 - 35 : 5 = 135 - 7= 128
d) 246 + 54 x 2 = 300 x 2= 600
tính bằng cách thuận tiện nhất
( 2008 - 2/135 + 1/50) - (1 - 7/135 + 4/50) - (5 + 5/135 + 3/50)
\(=2008-\dfrac{2}{135}+\dfrac{1}{50}-1+\dfrac{7}{135}-\dfrac{4}{50}-5-\dfrac{5}{135}-\dfrac{3}{50}\)
\(=2002\)
\(\left(2018-\frac{2}{135}+\frac{1}{50}\right)-\left(1-\frac{7}{135}+\frac{4}{50}\right)-\left(5+\frac{5}{135}+\frac{3}{50}\right)\)
\(\left(2018-\frac{2}{135}+\frac{1}{50}\right)-\left(1-\frac{7}{135}+\frac{4}{50}\right)-\left(5+\frac{5}{135}+\frac{3}{50}\right)\)
\(=2018-\frac{2}{135}+\frac{1}{50}-1+\frac{7}{135}-\frac{4}{50}-5-\frac{5}{135}-\frac{3}{50}\)
\(=2012-\frac{6}{50}\)
1. tìm x
2x -3 = x + 1/2
2. tính bằng hai cách
A = ( 2008 - 2/135 +1/50) - ( 1 - 7/135 +4/50) - ( 5+ 5/135 +3/50)
cần gấp nha
Mk giải câu 1 nha
1) 2x - 3 = x + 1/2
➡️2x - x = 1/2 + 3
➡️x = 7/2
Hok tốt~
Tính nhanh:
7) ( 135 - 35) . (-47) + 53 . ( -48 - 52)
8) ( 35 - 5) . (-4) + 24 . ( -13 -17)
7: \(=-47\cdot100+53\cdot\left(-100\right)=100\cdot\left(-100\right)=-10000\)
8: \(=30\cdot\left(-4\right)-24\cdot30=30\cdot\left(-28\right)=-840\)