15 + 6 + 84 - 23 + 32 - 12 + 55 - 13
= 15 + (6 + 84) - 23 + 32 - 12 + 55 - 13
= 15 + 90 - 23 + 32 - 12 + 55 - 13
= 105 - 23 + 32 - 12 + 55 - 13
= 82 + 32 - 12 + 55 - 13
= 114 - 12 + 55 - 13
= 102 + 55 - 13
= 157 - 13
= 144
15 + 6 + 84 - 23 + 32 - 12 + 55 - 13
= 15 + (6 + 84) - 23 + 32 - 12 + 55 - 13
= 15 + 90 - 23 + 32 - 12 + 55 - 13
= 105 - 23 + 32 - 12 + 55 - 13
= 82 + 32 - 12 + 55 - 13
= 114 - 12 + 55 - 13
= 102 + 55 - 13
= 157 - 13
= 144
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 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
Bài 1 :
15 + 12 =
13 + 20 =
30 + 33 =
Bài 2 : < , > , =
33 55 66 23 76 54
Bài 3 :
Lớp 2A6 có 39 học sinh , có 11 bạn chuyển vào lớp 2A6 . Hỏi lớp 2A6 có tất cả bao nhiêu học sinh ?
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=?
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
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23
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=
\(1+2+3+4+5+6+7+8+9+12+13+14+15+16+17+18+19+23+24+25+26+27+28+29=?\)
Trả lời xong thì kết bạn nha