Oblicz:
-21+17=
-5 1/4-0,25=
-1/5-0,5=
-6,3+(-2 2/5)=
Najpierw regułka
plus:
10+5=15
(-10)+(-5)=(-15)
10+(-5)= 5
(-10)+5= (-5)
na minus:
10-5=5
(-10)-(-5)=(-10)+5=(-5)
(-10)-5=(-15)
(-5)+10=5
-21+17=(-4)
-5 1/4-0,25=5,5
-1/5-0,5=(-0,7)
-6,3+(-2 2/5)= 3,9
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Najpierw regułka
plus:
10+5=15
(-10)+(-5)=(-15)
10+(-5)= 5
(-10)+5= (-5)
na minus:
10-5=5
(-10)-(-5)=(-10)+5=(-5)
(-10)-5=(-15)
(-5)+10=5
-21+17=(-4)
-5 1/4-0,25=5,5
-1/5-0,5=(-0,7)
-6,3+(-2 2/5)= 3,9