26+22+14+18+12+0+8+0
=(26+14)+(22+18)+(12+8)+0+0
= 40 + 40 + 20 +0+0
=100
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tính 1*2*3*4*5*6*7*8*9*10*11*12*13*14*15*16*17*18*19*0*20*21*22*23*24*25*26*27*28*29*30*31*32
ai nhanh mình tích cho
Tính:
12 - 1 = 13 - 1 = 14 - 1 =
17 - 5 = 18 - 2 = 19 - 8 =
14 - 0 = 16 - 0 = 18 - 0 =
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=?
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=
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=
Tính nhấm:
14 + 4 = 29 - 5 = 5 + 5 = 10 - 2 =
18 + 1 = 26 - 2 = 38 - 2 = 42 + 0 =
17 + 2 = 10 - 5 = 34 - 4 = 49 - 8 =
4 + 2 = 10 - 6 = 3 + 4 = 14 + 4 =
8 - 5 = 19 + 0 = 2 + 8 = 18 - 5 =
3 + 6 = 17 - 6 = 10 - 7 = 12 + 7 =
(-10)+(-9)+(-8)+...+0+1+2+3+...+10+11+12+13+14+15+16+17+18+19+20
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=?