15+21+14-x=2^5:2^4
29+21-x=2
50-x=2
x=50-2
x=48
15 cộng 21 cộng 14-x=2 50-x=2 x=50-2 x=48 Vậy x=48, nhé.
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Tính:1-2+3-4+5-6+7-8+9-10+11-12+13-14+15-16+17-18+19-20+21
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Tính :
a) 12 + 3 = 15 + 4 = 8 + 2 = 14 + 3 =
15 - 3 = 19 - 4 = 10 - 2 = 17 - 3 =
b) 11 + 4 + 2 = 19 - 5 - 4 = 14 + 2 - 5 =
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21?
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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:
11 + 3 - 4 = 14 - 4 + 2 = 12 + 3 - 3 =
12 + 5 - 7 = 15 - 5 + 1 = 15 - 2 + 2 =