tính nhanh:
a/(12560 - 2060-500) : (72+74+76+78+80+82+84+86+88+90)
b/(123/100x1/9-10/100x1/9-13/100x1/9)x(23/100-1/10-13/100)
100+100+200-600+400-90-64+50+4-80+20-6+3+3-50+10+200-90-90-20+123-100-20-3+50-49-1+60-30-30+741-700-40-1=???
Ai giải ra bài toán này mình tick cho
\(120+x-10=90+100\)
k mk nha
Tìm x :
X+x *2/5 :1/10 +x:0,5=24,5
36+32,5*6=x+1,4/x + 195
152,7 +32,7/x +92,46+111
[1/2 + 1/6 +..........................+ 1/90 ] *100 - [ 2,5 : { x+ 2,06 } ]
Tìm x biết (90 + 90 + ...... (100 số 90)) * x = 90 + 90 + 90 + ........(130 số 90)
[ 100+ ( 90 + 10 ) ] = ?
20 + 20 /10 +87 +88 +90 +10 *100 /10 * 800 / 1000 =
(1/2+1/6+1/12+1/20+...+1/90) x 100 = ?
c = 1 x 2 + 2 x 3 + 3 x 4 + 4 x 5 + ... + 90 x 100