Odpowiedź:
d)m=8-4
m=12
_______
12-4=8
E)X=11-7
X=4
________
4+7=11
f)y=9-4
y=5
_________
5+4=9
d)m=8:4
m=2
2•4=8
e)X=21:7
X=3
3•7=21
f)f=9:3
f=3
____________
3•3=9
d)2•m-4=8
2•m=8+4
2•m=12
m=12:2
m=6
__________
2•6-4=8
E)8•x+7=15
8•x=15-7
8•x=8
X=8:8
X=1
______________
8•1+7=15
f)-4•h+5=29
-4•h=29-5
-4•h=24
h=24:(-4)
h=-6
___________
-4•(-6)+5=29
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Odpowiedź:
d)m=8-4
m=12
_______
12-4=8
E)X=11-7
X=4
________
4+7=11
f)y=9-4
y=5
_________
5+4=9
d)m=8:4
m=2
________
2•4=8
e)X=21:7
X=3
_________
3•7=21
f)f=9:3
f=3
____________
3•3=9
d)2•m-4=8
2•m=8+4
2•m=12
m=12:2
m=6
__________
2•6-4=8
E)8•x+7=15
8•x=15-7
8•x=8
X=8:8
X=1
______________
8•1+7=15
f)-4•h+5=29
-4•h=29-5
-4•h=24
h=24:(-4)
h=-6
___________
-4•(-6)+5=29