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a) 10 20 = − 12 − 24 = 1 2 ; 13 26 = − 21 42 = − 1 2 ; − 20 30 = 18 − 27 = − 2 3
b) 5 15 = − 11 33 = − 1 3 ; 24 36 = − 20 − 30 = 2 3 ; 24 16 = − 15 − 10 = 3 2
1+2+3+4+5+6+7+8+9+10=55
11+12+13+14+15+16+17+18+19+20=155
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+30-50-53=362
\(1+2+3+4+5+6+7+8+9+10=55\)
\(11+12+13+14+15+16+17+18+19+20=155\)
1.
a) \(-\frac{15}{17}>-\frac{19}{21}\)
b)\(-\frac{13}{19}>-\frac{19}{23}\)
c)\(-\frac{23}{49}>-\frac{25}{47}\)
d)\(\frac{317}{633}>\frac{371}{743}\)
e)\(-\frac{24}{35}< -\frac{19}{30}\)
f)\(\frac{12}{17}< \frac{13}{18}\)
g) \(-\frac{17}{26}< -\frac{16}{27}\)
h) \(\frac{84}{-83}< -\frac{337}{331}\)
i) \(-\frac{1941}{1931}< -\frac{2011}{2001}\)
j) \(-\frac{1930}{1945}>-\frac{1996}{2001}\)
k) \(\frac{37}{59}< \frac{47}{59}\)
I) \(-\frac{25}{124}>-\frac{27}{100}\)
m) \(-\frac{97}{201}>-\frac{194}{309}\)
n) \(-\frac{189}{398}< -\frac{187}{394}\)
o) \(-\frac{289}{403}>-\frac{298}{401}\)
a ) 11 22 = − 15 − 30 = 1 2 ; 17 − 34 = − 19 38 = − 1 2 ; − 20 30 = 18 − 27 = − 2 3
b ) 2 − 8 = − 11 44 = − 1 4 ; 25 35 = − 15 − 21 = 5 7 ; 20 16 = − 50 − 40 = 5 4