Cho F = − 9 25 . 53 3 − − 3 5 2 . 22 3 và P = 1 − 1 2 . 1 − 1 3 . 1 − 1 4 ... 1 − 1 999 . 1 − 1 1000 . Khi đó tổng F + P bằng
A. − 624 125
B. 3133 1000
C. − 8999 1000
D. 314 100
2 . 53 . 27 + 6 . 9 . 87 - 3 . 18 . 40 = ???
12 . 25 + 29 . 25 + 59 . 25 = ???
43 . 37 + 93 . 43 + 57 . 61 + 69 . 57 = ???
12 . 53 + 53 . 172 - 53 = ???
35 . 54 + 35 . 58 + 65 . 75 + 65 . 45 = ???
39 . 8 + 70 . 3 + 31 . 8 = ???
2 . 53 . 27 + 6 . 9 . 87 - 3 . 18 . 40
= 2. 53 . 9 . 3 + 2. 3 .9 .87 - 3 .2 .9 .40
= 54.53+54.87-54.40
=54(53+87-40)
=54. 100=5400
12 . 25 + 29 . 25 + 59 . 25
= 25 . ( 12+29+59)
=25 . 90
=2250
43 . 37 + 93 . 43 + 57 . 61 + 69 . 57
= 43.(37+93)+57(61+69)
=43.130+57.130
=130.(43+57)
=130.100
=13 000
12 . 53 + 53 . 172 - 53
=53(12+172-1)
=53.184
=9752
35 . 54 + 35 . 58 + 65 . 75 + 65 . 45
=35(54+58)+65(75+45)
=35.112+65.120
=3920+7800
=11720
39 . 8 + 70 . 3 + 31 . 8
=8(39+31)+70.3
=8.70+70.3
=70.(8+3)
=70.11
=770
2 . 53 . 27 + 6 . 9 . 87 - 3 . 18 . 40
= ( 2 . 27 ) . 53 + ( 6 . 9 ) . 87 - ( 3 . 18 ) . 40
= 54 . 53 + 54 . 87 - 54 . 40
= 54(53+87-40)
= 5400
12 . 25 + 29 . 25 + 59 . 25
= 25( 12 + 29 + 59 )
= 2500
43 . 37 + 93 . 43 + 57 . 61 + 69 . 57
= 43( 37 + 93 ) + 57(61 + 69 )
= 5590 + 7410
= 13000
12 . 53 + 53 . 172 - 53
= 53( 12 + 172 ) - 53
= 9752 - 53
= 9699
35 . 54 + 35 . 58 + 65 . 75 + 65 . 45
= 35( 54 + 58 ) + 65( 75 + 45 )
= 3920 + 7800
= 11720
Tính nhanh:
a) 64+469+31+36
b) 25×2018×4
c) 325×78+325×22
d) 9×11×53+33×66×3+99
e) 259×268-259×168
f) 25×6×4×125×8
hello; how are you
a)
= (64 + 36) + (469 + 31)
= 100 + 500
= 600
b)
= 25 . 2018 . 4
= (25 . 4) . 2018
= 100 . 2018
= 201800
Thực hiện phép tính (tính nhanh nếu có thể)
a)3 . 52 + 15 . 22 - 26 : 2
b)53. 2 - 100 : 4 + 23. 5
c)62 : 9 + 50 . 2 - 33 . 33
d)32 . 5 + 23 . 10 - 81 : 3
e)513 : 510 - 25 . 22
f)20 : 22 + 59 : 58
a) \(3.5^2+15.2^2-26\div2\)
= 3.25 + 15.4 - 13
= 75 + 60 - 13
= 135 - 13
= 122
b) \(5^3.2-100\div4+2^3.5\)
= 125.2 - 25 + 8.5
= 250 - 25 + 40
= 225 + 40
= 265
c)\(6^2\div9+50.2-3^3.33\)
= 36 : 9 + 100 - 9.33
= 4 + 100 - 297
= 104 - 297
= -193
d)\(3^2.5+2^3.10-81\div3\)
= 9.5 + 8.10 - 27
= 45 + 80 - 27
= 125 - 27
= 98
e) \(5^{13}\div5^{10}-25.2^2\)
= 53 - 25.4
= 125 - 100
= 25
f) \(20\div2^2+5^9\div5^8\)
= 20 : 4 + 5
= 5 + 5
= 10
a) 25 - 53 : 52 + 12 : 22
b) 5 [ ( 85 - 35 : 7 ) : 8 + 90 ] - 50
c) 2. [ ( 7 - 33 : 32 ) 22 + 99 ] - 100
d) 27 : 22 + 54 : 53 . 24 - 3 . 25
e) ( 35 . 37 ) : 310 + 5 . 24 - 73 : 7
f) 32 . [ ( 52 - 3 ) : 11 ] - 24 + 2 . 103
g) ( 62007 - 62006 ) : 62006
h) ( 52001 - 52000 ) : 52000
i) ( 72005 + 72004 ) : 72004
j) ( 57 + 75 ) . ( 68 + 86 ) . ( 24 - 42 )
k) ( 57 + 79 ) . ( 54 + 56 ) . ( 33 . 3 - 92 )
l) [ ( 52 . 23) - 72 . 2 ) : 2 ] 6 - 7 . 25
tính nhanh nhé
7) 53(51+4)+53(49+96)+53
8)42(15+96)+6(25+4).7
9) 45(13+78)+9(87+22).5
10) 16(27+75)+8(53+25).2
7)
53.(51+4)+53.(49+96)+53
=53.55+53.145+53
=53.(55+145+1)
=53.201
=10653
8)
42.(15+96)+6.(25+4).7
=42.111+(6.7).29
=42.111+42.29
=42.(111+29)
=42.140
=5880
9)
45.(13+78)+9.(87+22).5
=45.91+(9.5).109
=45.91+45.109
=45.(91+109)
=45.200
=9000
10)
16.(27+75)+8.(53+25).2
=16.102+(8.2).78
=16.102+16.78
=16.(102+78)
=16.180
=2880
7)
53.(51+4)+53.(49+96)+53
=53.55+53.145+53
=53.(55+145+1)
=53.201
=10653
8)
42.(15+96)+6.(25+4).7
=42.111+(6.7).29
=42.111+42.29
=42.(111+29)
=42.140
=5880
9)
45.(13+78)+9.(87+22).5
=45.91+(9.5).109
=45.91+45.109
=45.(91+109)
=45.200
=9000
10)
16.(27+75)+8.(53+25).2
=16.102+(8.2).78
=16.102+16.78
=16.(102+78)
=16.180
=2880
Tính nhanh
a (-4) x (-3) x 25 x (-8)
b 7x(-25).(-3)2.(-4)
c [93-(20-7)] : 16
d 53-(-51)+(-53)+49
e 168 - (49)+(-68)+4
f 53 -(-7)+(-53)-49
g 25.(-124)+124.25
h (-11).36+64.(-11)
i 125.(-24) +24.125
k 125.(-23)+23.225
l (-11).36+64.(-11)
Giúp mk với!
tính nhanh
3) 14.35.5+10.25.7+20.7
4) 15(27+18+6)+ 15(23.12)
5) 24(15+49)+12(50+42)
6) 10(81+19)+100+50(91+9)
7) 53(51+4)+53(49+96)+53
8)42(15+96)+6(25+4).7
9) 45(13+78)+9(87+22).5
10) 16(27+75)+8(53+25).2
giúp mik nhé các bạn mong các bạn giúp đỡ
5) 24*(15+49)+12*(50+42)
=24*64+12*92
=24*64+12*2*46
=24*64+24*46
=24*(64+46)
=24*110
=2640
7) 53*( 51+4)+53*(49+96)+53
=53*55+53*145+53
=53*(55+145)+53
=53*200+53
10600+53
=10653
tính
15/25 + 5
3/2 - 4/8
2/9 x 5
6/7 : 3/4
15/25 + 5=28/5
3/2 - 4/8=1
2/9 x 5 =10/9
6/7 : 3/4=8/7
15/25 + 5 = 15/25 + 125/25 = 140/25 = 28/5
3/2 - 4/8 = 12/8 - 4/8 = 8/8 = 1
2/9 x 5 = 10/9
6/7 : 3/4 = 6/7 x 4/3 = 8/7
\(\dfrac{15}{25}+5=\dfrac{15}{25}+\dfrac{5}{1}=\dfrac{15}{25}+\dfrac{125}{25}=\dfrac{15+125}{25}=\dfrac{140}{25}=\dfrac{28}{5}\)
\(\dfrac{3}{2}-\dfrac{4}{8}=\dfrac{12}{8}-\dfrac{4}{8}=\dfrac{12-4}{8}=\dfrac{8}{8}=1\)
\(\dfrac{2}{9}x5=\dfrac{2x5}{9x1}=\dfrac{10}{9}\)
\(\dfrac{6}{7}:\dfrac{3}{4}=\dfrac{6x4}{7x3}=\dfrac{24}{21}=\dfrac{8}{7}\)
Cho hàm số y=f(x)=1–8x.y=f(x)=1–8x. Khẳng định nào sau đây là đúng:
a) f(−1)=9?f(−1)=9?
b) f(12)=−3?f(12)=−3?
c) f(3)=25?
4/25-5/100, 63/30-4/5, 17/10-9/5, 5/9-7/36, 53/16-3/4