23*75+25*10+25*13+180
23*75+25*10+25*13+180
23*75+25*10+25*13+180
= 69*25+25*10+25*13+180
=(69+10+13)25+180
=92*25+180
=2300+180
=2480
23 * 75 + 25 * 10 + 25 * 13 + 180
= 23 * 75 + 25 * ( 10 + 13 ) + 180
= 23 * 75 + 25 * 23 + 180
= 23 * ( 75 + 25 ) + 180
= 23 * 100 + 180
= 2300 + 180
= 2480
23 . 75 +25 . 10 + 25 . 13 +180 =
23 . 75 + 25 . 10 + 25 . 13 + 180 = 23 . 75 + 25.(10+13) + 180
= 23.75 + 25.23 + 180 = 23.(75 + 25) + 180
= 23.100 + 180 = 2300 + 180 = 2480
23 x 75 + 25 x 10 + 25 x 13 + 180
= 23 x 75 + 25 x ( 10 + 13 ) + 180
= 23 x 75 + 23 x 25 + 180
= 23 x ( 75 + 25 ) + 180
= 23 x 100 + 180
= 2300 + 180
= 2480
~ HOK TỐT ~
\(23.75+25.10+25.13+180\)
\(=23.75+25\left(10+13\right)+180\)
\(=23.75+25.23+180\)
\(=23\left(75+25\right)+180\)
\(=23.100+180\)
\(=2300+180\)
\(=2480\)
tính :
a, 1 + 2 + 3 + ... + 2018
b, 4 + 7 + 10 + 13 + ... + 2017
c, 1 + 2 - 3 - 4 + 5 + 6 - 7 - 8 + 9 + 10 - 11 -12 + 13 + 14
d, 23 x 75 + 25 x 23 + 180
giúp mình nha mình gấp lắm ai nhanh mình tick
a) 1+2+3+...+2018
=[(2018-1):1+1].(2018+1):2
=2018.2019:2
=2037171
b) 4+7+10+13+...+2017
=[(2017-4):3+1].(2017+4):2
=672.2021:2
=679056
c) 1+2-3-4+5+6-7-8+9+10-11-12+13+14
=(1+2-3-4)+(5+6-7-8)+(9+10-11-12)+13+14
=-4+(-4)+(-4)+13+14
=-12+27
=15
d) 23 x 75 + 25 x 23 + 180
=23 x (75+25) +180
=23 x 100 +180
=2300+180
2480
chúc ban hoc tốt nha
a) Số số hạng: ( 2018 - 1 ) : 1 + 1 = 2018
Tổng: 2018 x ( 2018 + 1 ) : 2 = 2 037 171
b) Số số hạng: ( 2017 - 4 ) : 3 + 1 = 672
Tổng: 672 x ( 2017 + 4 ) : 2 = 679 056
câu 1 :23*75+25*12+180+25*11
câu 2; 25*46+75*84+25*72+34*75
*là nhân nhé
Thực hiện phép tính: 23 . 75 + 25 . 23 + 180
23 . 75 + 25 . 23 + 180
= 23 . (75 + 25) + 180
= 23 . 100 + 180
= 2300 + 180 = 2480
a)15×17-15/15×16+10
b)23×29-10/23×28+13
c)75×8+25/75×82-50
d)53+153×156/153×157-100
Bạn có thể viết rõ hơn ra được không ạ . Chứ mình nhìn nó ra nhiều trường hợp lắm .
Tính nhanh
23×75+25×23+180
23 x 75 + 25 x 23 + 180
= 23 x (75 +25 ) +180
= 23 x 100 + 180
= 2300+180
=2480
ủng hộ mik nha
23×75+25×23+180
=23×75+25×23+ 25 + 130
= 23 x ( 75 + 23 + 2 ) + 130
= 23 x 100 + 130
=2300 + 120
=2420
23 x 75 + 25 x 23 + 180
= 23 x ( 75 + 25 ) + 180
= 23 x 100 + 180
= 2300 + 180
= 2480
-23 / 25 . 10 / 13 + -23 / 25 . 3 / 13 + -27 / 25
\(\frac{-23}{25}.\frac{10}{13}+\frac{-23}{25}.\frac{3}{13}+\frac{-27}{25}\)
= \(\frac{-23}{25}.\left(\frac{10}{13}+\frac{3}{13}\right)+\frac{-27}{25}\)
= \(\frac{-23}{25}.1+\frac{-27}{25}\)
= \(\frac{-23}{25}+\frac{-27}{25}\)
= \(\frac{-50}{25}\)
= \(-2\)
\(\frac{-23}{25}.\frac{10}{13}+\frac{-23}{25}.\frac{3}{13}+\frac{-27}{25}\)
\(=\frac{-23}{25}\left(\frac{10}{13}+\frac{3}{13}\right)+\frac{-27}{25}\)
\(=\frac{-23}{25}+\frac{-27}{25}=\frac{-50}{25}=-2\)
-23/25.10/13+-23/25.3/13+-27/25
= -23/25(10/13+3/13)+-27/25
= -23/25.1+-27/25
= -23/25+-27/25
= -2
1,(-12).46-12.54
2,3784+23-3785-15
3,(-8).25.(-2).4.(-5).125
4,19.25+9.95+19.30
5,(-50+19+143)-(-79+25+48)
6,(-25).(75-45)-75(45-25)
7,(-37-17).(-9)+35.(-9-11)
8,(187-23)-(20-180)
9,512.(2-128.(-512)
10,17.(-25)+25.21
1/\(\left(-12\right)\cdot46-12\cdot54=\left(-12\right)\cdot46+\left(-12\right)\cdot54\)
\(=\left(-12\right)\cdot\left(46+54\right)=\left(-12\right)\cdot100=-1200\)
2/\(3784+23-3785-15=3785+22-3785-15\)
\(=22-15=7\)
3/\(\left(-8\right)\cdot25\cdot\left(-2\right)\cdot4\cdot\left(-5\right)\cdot125\)
\(=\left[\left(-8\right)\cdot125\right]\cdot\left[25\cdot4\right]\cdot\left[\left(-5\right)\cdot\left(-2\right)\right]\)
\(=\left(-1000\right)\cdot100\cdot10=-1000000\)
4/\(19\cdot25+9\cdot95+19\cdot30=19\cdot\left(25+30\right)+9\cdot95\)
\(=19\cdot55+9\cdot95=95\cdot11+9\cdot95=95\cdot\left(11+9\right)=20\cdot95=1900\)
5/\(\left(-50+19+143\right)-\left(-79+25+48\right)\)
\(=\left(-50\right)+19+143+79-25-48\)
\(=118\)
6/\(\left(-25\right)\cdot\left(75-45\right)-75\cdot\left(45-25\right)\)
\(=\left(-25\right)\cdot30+\left(-25\right)\cdot3\cdot20\)
\(=\left(-25\right)\cdot\left(30+60\right)=\left(-25\right)\cdot90=-2250\)
7/\(\left(-37-17\right)\cdot\left(-9\right)+35\left(-9-11\right)\)
\(=\left(-54\right)\cdot\left(-9\right)+35\cdot\left(-20\right)\)
\(=486+\left(-700\right)=-214\)
8/\(\left(187-23\right)-\left(20-180\right)\)
\(=187-23-20+180=324\)
9/\(512\cdot2-128\cdot\left(-512\right)\)
\(=512\cdot2+128\cdot512=512\cdot\left(2+128\right)\)
\(=512\cdot130=66560\)
10/\(17\cdot\left(-25\right)+25\cdot21\)
\(=17\cdot\left(-25\right)-\left(-25\right)\cdot21=\left(-25\right)\cdot\left(17-21\right)\)
\(=\left(-25\right)\cdot\left(-4\right)=100\)
Chúc bạn học tốt.