x - 435 = 100
435+1000+( -435) + ( -100)
tìm x biết
a)565-(6x+70)=435
b)100-7(x-5)=58
\(a,565-\left(6x+70\right)=435\)
\(6x+70=565-435\)
\(6x+70=130\)
\(6x=130-70\)
\(6x=60\)
\(x=10\)
\(b,100-7\left(x-5\right)=58\)
\(100-7x+35=58\)
\(100-7x=58-35\)
\(100-7x=23\)
\(7x=100-23\)
\(7x=77\)
\(x=11\)
a, 565-(6x+70)=435
6x+70=565-435
6x+70=130
6x=130-70
6x=60
x=60:6
x=6
b, 100-7(x-5)=58
7(x-5)=100-58
7(x-5)=42
x-5=42:7
x-5=6
x=6+5
x=11
\(a,565-\left(6x+70\right)=435\)
\(6x+70=130\)
\(6x=130-70\)
\(6x=60\)
\(x=10\)
\(b,100-7\left(x-5\right)=58\)
\(7\left(x-5\right)=100-58\)
\(7\left(x-5\right)=42\)
\(x-5=42:7\)
\(x-5=6\)
\(x=6+5\)
\(x=11\)
435 x 85 + 435 x 45 - 435 x 31 + 435 =
Giải lần lượt ra nha
TL:
435 x 85 + 435 x 45 - 435 x 31 + 435
= 435 x 85 + 435 x 45 - 435 x 31 + 435 x 1
= 435 x (85 + 45 - 31 + 1)
= 435 x 100
= 43500
HT
Nhớ t i c k
435 x 85 + 435 x 45 - 435 x 31 + 435
435 x 85 + 435 x 45 - 435 x 31 + 435 x 1
= 435 x ( 85 + 45 - 31 + 1 )
= 435 x 100
= 43500
435 x 25 + 76 x 435 - 435 = ?
435 x 25 + 76 x 435 - 435
= 435 x 25 + 76 x 435 - 435 x 1
= 435 x ( 25 + 76 - 1 )
= 435 x 100
= 43500
ai k mk mk k lai
435x25+76x435-435
=(25+76)x435-435
=101x435-435
=43935-435
=43500
= 435 x 25 + 76 x 435 - 435 x 1
= 435 x (25 + 76 - 1)
= 435 x 100
= 43 500
(435 x 234 - 89) : (233 x 435 + 346)
\(\dfrac{435\cdot234-89}{233\cdot435+346}=1\)
Tính nhanh
a : 2459 - ( 400 + 459 )
b : 435 x 25 + 76 x 435 - 435
c : 35 x 49 + 51 x 36
a) \(\text{2459 - (400 + 459)}\)
\(\text{= 2459 - 859}\)
\(\text{= 1600}\)
b) \(435\times25+76\times435-435\)
\(=435\times\left(25+76-1\right)\)
\(=435\times100\)
\(=43500\)
c) \(35\times49+51\times36\)
\(=35\times49+51\times\left(35+1\right)\)
\(=35\times49+51\times35+51\)
\(=35\times\left(49+51\right)+51\)
\(=35\times100+51\)
\(=3500+51\)
\(=3551\)
a) 2459 - (400 + 459)
= 2459 - 400 - 459
= (2459 - 459) - 400
= 2400 - 400
= 2000
b) 435 x 25 + 76 x 435 - 435
= 435 x (25 + 76 - 1)
= 435 x 100
= 43500
c) 35 x 49 + 51 x 36
= 1715 + 1836
= 3551
Tính nhanh:328/435 x 468/432 x 435/164 x 432/984 x 164/468
\(\frac{328}{435}\cdot\frac{468}{432}\cdot\frac{435}{164}\cdot\frac{432}{984}\cdot\frac{164}{468}\)
\(=\frac{328}{984}\)
\(=\frac{1}{3}\)
Gấp gấp, giúp mình với!!!
Tại sao 135/435 .100% lại bằng 31% vậy ạ><
Cái này mình làm tròn lên thôi bạn
Gấp gấp, giúp mình với!!!
Tại sao 135/435 .100% lại bằng 31% vậy ạ><
135/435=9/29*100% làm tròn là 31% á bạn