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\(\dfrac{9}{5}=\dfrac{18}{10}=1,8\)
\(\dfrac{2}{25}=\dfrac{8}{100}=0,08\)
\(\dfrac{23}{8}=\dfrac{2875}{1000}=2,875\)
\(\dfrac{76}{4}=\dfrac{1900}{100}=19\)
\(\dfrac{42}{25}=\dfrac{168}{100}=1,68\)
9/5 =18/10=1,8
2/25 =8/100=0,08
23/8 =2874/1000=2,874
76/4 =1900/100=19
42/25 =168/100=1,68
71 + 72 + 73 + 74 + 75 + 76 + 77 + 78 + 79
= ( 71 + 79 ) + ( 72 + 78 ) + ( 73 + 77 ) + ( 74 + 76 ) + 75
= 150 + 150 + 150 + 150 + 75
= 150 x 4 + 75
= 600 + 75
= 675
Tìm x :
X x 7 + X x 2 = 108
X x ( 7 + 2 ) = 108
X x 9 = 108
X = 108 : 9
X = 12
\(71+72+73+74+75+76+77+78+79\)
\(=\left(71+79\right)+\left(72+78\right)+\left(73+77\right)+\left(74+76\right)+75\)
\(=150+150+150+150+75\)
\(=600+75\)
\(=675\)
\(X\)x\(7+X\)x\(2=108\)
\(X\)x\(\left(7+2\right)=108\)
\(X\)x\(9=108\)
\(X=108:9\)
\(X=12\)
Vậy \(X=12\)
2/25=4/50=0,08
111/125=222/250=0,888
23/8=46/16=2,875 76/4=152/8=19 42/25=84/50=1,68 370/50=740/100=7,4
2/25=4/50=0,08
111/125=222/250=0,888
23/8=46/16=2,875 76/4=152/8=19 42/25=84/50=1,68 370/50=740/100=7,4
= 37 × 24 + 37 × 76 + 63 × 79 + 21 × 63
= 37 x (24 + 76) + 63 x (79 + 21)
= 37 x 100 + 63 x 100
= (37 + 63) x 100
= 100 x 100
= 10 000
37 x 24 + 37 x 76 + 63 x 79 + 21 x 63
=37 x (24 + 76) + 63 x (79 + 21)
=37 x 100 + 63 x 100
=100 x ( 37 + 63 )
=100 x 100
=10000
2/25=8/100=0,08
111/125=888/1000=0,888
23/8=2875/1000=2,875
76/4=1900/100=19
42/25=168/100=1,68
370/50=740/100=7,4
2/25=8/100=0,8
111/125=888/1000=0,888
23/8=2875/1000=2,875
76/4=1900/100=1,9
42/25=168/100=1,68
370/50=740/100=7,4
\(\frac{9}{5}=\frac{18}{10}=1,8\)
\(\frac{2}{25}=\frac{8}{100}=0,08\)
\(\frac{111}{125}=\frac{888}{1000}=0.888\)
\(\frac{23}{8}=\frac{2875}{1000}=2,875\)
\(\frac{76}{4}=\frac{1900}{100}=19\)
\(\frac{9}{5}=\frac{18}{10}=1,8\)
\(\frac{2}{25}=\frac{8}{100}=0,08\)
\(\frac{111}{125}=\frac{111.8}{125.8}=\frac{888}{1000}=0,888\)
\(\frac{76}{4}=19\)
\(\frac{23}{8}=\frac{23.125}{8.125}=\frac{2875}{1000}=2,875\)
\(\frac{42}{25}=\frac{42.4}{25.4}=\frac{168}{100}=1,68\)
\(\frac{370}{50}=\frac{37}{5}=\frac{37.2}{5.2}=\frac{74}{10}=7,4\)
Nguyen Vu Thien Truc bày đạt Trần Trà Mi lớp 9 rồi
30+79(25+76:2-10)
= 4217