21 - 19 + 25 * 30 : 2
= 21 - 19 + 750 : 2
= 2 + 375
= 377
Tick nhé!!!
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Các câu hỏi tương tự
(6*5-30)*(19+21+23+25+27+29+31)=?
18+19+20+21+22+23+24+25+26+27+28+29+30=?
Ai nhanh tick cho! Rảnh kb & ib với mk!!!!
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+32+33+34+35+36+37+38+39+40+41+42+43+44+45+46+47+48+49+50.
Find the values of these espressions :
25 - (20 - 10)
80 - (30 + 25
125 + (13 + 7)
416 - (25 - 21)
(65 + 15) x 2
46 : (6 : 3)
(74 - 14) : 2
81 : (3 x 3)
123 x (42 - 40)
(100 + 11) x 9
72 : (2 x 4)
64 : (8 : 4)
a) 10+x=15-1-1
b) 25-5=112-40-x
c) 9x7=52-10-x
d) 54-x=65-21+3
e) (25+30)x65=695+561+985+312+1002+x
Tính nhanh :
11+13+15+17+19+21+23+25+27+29
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27=.................................
255 + 60 + 55 + 19 + 12 + 38 =......................
25 + 31 + 30 + 19 + 5 + 10 =............................
Ai nhanh mk tick