25 + 6 +7
Cho phép tính sau: (25+7) : (56−25)× ( 8 : 3) :2+64 ×3%
Phép tính nào thực hiện được trong chương trình bảng tính?
A.
=(25+7)/(56-25)x(8/3)/2+6^4x3%
B.
=(25+7)/(56-2^5)x(8/3):2+6^4x3%
C.
=(25+7)/(56-25)*(8/3)/2+64* 3%
D.
=(25+7)/(56-2/5)x(8/3)/2+6^4x3%
25 * 7 + 25 * 3 + 25 * 4 + 25 * 6 = ?
25*7+25*3+25*4+25*6
= 25*(7+3+4+6)
= 25*20
= 25*10*2
= 250*2
= 500
25 * 7 + 25 * 3 + 25 * 4 + 25 * 6
=25x(7+3)+(4+6)
=25x(10+10)
=500
tk nha bạn
thank you bạn
25*{7+3+4+6}
25*20
BANGBBAO NHIEU BAN TU VIET NHA
25 * 7 - 25 * 3 + 25 * 4 + 25 * 6 = ?
25 * 7 - 25 * 3 + 25 * 4 + 25 * 6
=25 * ( 7 -3 +4 +6 )
= 25 * 14
=350
=25*(7-3+4+6)
=25*14
=350
a) 7/-25+8/25 ; 4/5+4/-18 ; 7/21+9/-36
b) 12/20-2/5 ; 2/3-(-5/6) ; 6-3/20
c)2/21*(-7/3) ; 27/28*(-21) ; -15/7*(-14/25)
a) \(\dfrac{7}{-25}+\dfrac{8}{25}=\dfrac{-7}{25}+\dfrac{8}{25}=\dfrac{1}{25}\)
\(\dfrac{4}{5}+\dfrac{4}{-18}=\dfrac{4}{5+\left(-18\right)}=\dfrac{4}{-13}=\dfrac{-4}{13}\)
\(\dfrac{7}{21}+\dfrac{9}{-36}=\dfrac{1}{3}+\dfrac{1}{-4}=\dfrac{1}{3+\left(-4\right)}=\dfrac{1}{-1}=1\)
b) \(\dfrac{12}{20}-\dfrac{2}{5}=\dfrac{12}{20}+\left(\dfrac{-2}{5}\right)=\dfrac{3}{5}+\dfrac{-2}{5}=\dfrac{3+\left(-2\right)}{5}=\dfrac{1}{5}\)
\(\dfrac{2}{3}-\dfrac{-5}{6}=\dfrac{2}{3}+\dfrac{5}{6}=\dfrac{4}{6}+\dfrac{5}{6}=\dfrac{9}{6}=\dfrac{3}{2}\)
\(6-\dfrac{3}{20}=6+\dfrac{-3}{20}=\dfrac{60}{60}+\dfrac{-9}{60}=\dfrac{51}{60}\)
c) \(\dfrac{2}{21}.\dfrac{-7}{3}=\dfrac{2.\left(-1\right)}{7.3}=\dfrac{-2}{21}\)
\(\dfrac{27}{28}.\left(-21\right)=\dfrac{27.\left(-21\right)}{28}=\dfrac{-567}{28}\)
\(\dfrac{-15}{7}.\dfrac{-14}{25}=\dfrac{-3.\left(-2\right)}{1.5}=\dfrac{6}{5}\)
Tính nhanh:
a, 325 * 6 + 6 * 560 +115 * 6
b, 133 : 7 + 154 : 7 + 413 :7
c, 64 * 25 + 35 * 25 + 25
d, 22 * 47 + 2 * 38 * 11 + 15 * 22
( Các bạn giải rõ ra nhé đúng thì mình tick cho )
a) 325 x 6 + 6 x 560 + 115 x 6
= 6 x ( 325 + 560 + 115)
= 6 x 1000
= 6000
b) 133 : 7 + 154 : 7 + 413 :7
= ( 133 + 154 + 413 ) : 7
= 700 : 7
= 100
c) 64 x 25 + 35 x25 + 25
= 25 x ( 64 + 35 + 1 )
= 25 x 100
= 2500
d) Quá dễ
a) 325 x 6 + 6 x 560 + 115 x 6
= 6 x ( 325 + 560 + 115 )
= 6 x 1000
= 6000
b) 133 : 7+ 154 : 7 + 413 : 7
= ( 133 + 154 + 413 ) : 7
= 700 : 7
= 100
c)64 x 25 + 35 x 25 + 25
= 25 x ( 64 + 35 + 1 )
= 25 x 100
= 2.500
d) 22 x 47 + 2 x 38 x 11 + 15 x 22
= 22 x ( 47 + 15 + 38 )
= 22 x 100
= 2200
\(325\times6+6\times560+115\times6\)
\(=6\times\left(325+560+115\right)\)
\(=6\times1000\)
\(=6000\)
28^7 . 5^6 . 15^9/14^6 . 25^7 . 6^10
`(28^7 . 5^6 . 15^9)/(14^6 . 25^7 . 6^10)`
`=(2^{14}.7^7. 5^6 .5^9 .3^9)/(2^{6}.7^6. 5^14. 2^10. 3^10)`
`=(2^{14}.3^9. 5^{15}.7^7)/(2^{16}.3^{10}.7^6. 5^14)`
`=(5.7)/(2^2 .3 )`
`=35/12`
tính nhanh:
a) 1/2*2/3 ; 5/6*6/7 ; 10/15*15/20 ;24/25*25/36
b)1/2*2/3*3/4*4/5*5/6*6/7*7/8*8/9*9/10
1x2x3x4x5x6x7x8x9
2x3x4x5x6x7x8x9x10
=1/10
b)1/2*2/3*3/4*4/5*5/6*6/7*7/8*8/9*9/10
=1x2x3x4x5x6x7x8x9
2x3x4x5x6x7x8x9x10
= 1
10
Cmr 7^25+6^27+6^28+....+6^38+7^3 chia hết cho 7
25 + 5 =
25 + 6 =
25 + 7 =
25+5=30
25+6=31
25+7=32
Ai k mik mik k lại cho 3 cái
1: 9 - 25 - (7 - x) - (25 + 7)
2: -6 . x = 18
3: [(6 . x - 72) : 2- 84]. 28= 5628
1: 9 - 25 - (7 - x) - (25 + 7)
đề thiếu
2: -6 . x = 18
x=18:(-6)
x=-3
3: [(6 . x - 72) : 2- 84]. 28= 5628
(6.x-72):2-84=5628:28
(6.x-72):2-84=201
(6.x-72):2=201+84
(6.x-72):2=285
6.x-72=285.2
6.x-72=570
6.x=570+72
6.x=642
x=642:6
x=107