`(50 + 78 + 90) - 30`
`= 218 - 30`
`= 188`
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`(50 + 78 + 90) - 30`
`= 218 - 30`
`= 188`
50+50+50=?
569+89+90=?
12+12=?
78+78=?
4+7=?
6+8=?
9+0=?
56-43=?
90 + 90 + 10 + 20 + 30 + 40 + 50 + 60 - 120 = ?
(60-50)+(40-30)+(90-80)-20=????
10+20+30+40+50+60+70+80+90+100=..................
10 + 20 + 30 + 40 + 50 + 60 + 70 + 80 + 90 +100 + 200 + 300 =
tính nhanh ;
10 + 20 + 30 + 40 + 50 + 60 + 70 + 80 + 90 + 100
tk nhé
Tính nhanh :
\(10+20+30+40+50+60+70+80+90\)
1+1+1+1+1+1+1+1+10+20+30+40+50+60+70+80+90+1=????
10 + 20 + 30 + 40 + 50 + 60 + 70 + 80 + 90 + 100 = ?
ai nhanh nhất mình tick cho.
Tính:
A=1+2+3+4+5+5+6+7+8+9+10
B=10+20+30+40+50+50+60+70+80+90+100