Odpowiedź:
zad. 13
a) 15-35=15+(-35)=-20
-37-10=-37+(-10)=47
b)4½-8=4½+(-8)=-3½
-7,25-9=-7,25+(-9)=-16,25
zad.14
a)-15-(-25)=-15+25=10
b)-6-(-2)=-6+2=-4
c)-110-(-656)=-110+656=546
d)4,1-(-6)=4'1+6=10,1
e)-5-(-9,3)=-5+9,3=4,3
zad. 15
a)18-10=8
18-(-10)=28
-18-10=-28
-18-(-10)=-8
b)-14-12=-26
-14-(-12)=-2
14-12=2
14-(-12)=26
c)2,75-5=-2,25
2,75-(-5)=7,75
-2,75-5=-7,75
-2,75-(-5)=2,25
zad.16
a)-77-22=-99
85-58=27
b)-9-(-73)=64
-222-444=-666
c)59-(-441)=500
-8,5-(-3)=-5,5
zad.17
a)3-(-5)=8
-5-(-8)=3
b)-8-2=-10
0-(-9)=9
c)-14-(-6)=-8
-7-(-7)=0
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Odpowiedź:
zad. 13
a) 15-35=15+(-35)=-20
-37-10=-37+(-10)=47
b)4½-8=4½+(-8)=-3½
-7,25-9=-7,25+(-9)=-16,25
zad.14
a)-15-(-25)=-15+25=10
b)-6-(-2)=-6+2=-4
c)-110-(-656)=-110+656=546
d)4,1-(-6)=4'1+6=10,1
e)-5-(-9,3)=-5+9,3=4,3
zad. 15
a)18-10=8
18-(-10)=28
-18-10=-28
-18-(-10)=-8
b)-14-12=-26
-14-(-12)=-2
14-12=2
14-(-12)=26
c)2,75-5=-2,25
2,75-(-5)=7,75
-2,75-5=-7,75
-2,75-(-5)=2,25
zad.16
a)-77-22=-99
85-58=27
b)-9-(-73)=64
-222-444=-666
c)59-(-441)=500
-8,5-(-3)=-5,5
zad.17
a)3-(-5)=8
-5-(-8)=3
b)-8-2=-10
0-(-9)=9
c)-14-(-6)=-8
-7-(-7)=0