Odpowiedź:
a)¾×(-12)-⅕= (-¾)×12-⅕= (-3)×(-⅕)= (-9)-⅕= (-46/5)= 9⅕
b)1⅔×(-⅚)×(-2⅘)= 5/3×(-⅚)×(-2⅘)= 5/3×(-⅚)×(-14/5)= ⅓×5/3×7= 35/9= 3 8/9
c)-1¾×2 1/7+⅜= (-7/4)×2×1/7×3/8= (-½×⅜)= (-3/16)
d)5-2⅘×(-2,5)= 5-(14/5)-(-2,5)= 5-(14/5)×(-5/2)= 5+(14/5)×(5/2)= 5+14×½= 5+7= 12
e)-1/12×(3¾-9¼)= (-1/12)×(15/4-9¼)= (-1/12)×(15/4-37/4)= (-1/12)×(-11/2)= 1/2×11/2= 11/24
f)12:(-⅓)+⅓×12= (-12):⅓+⅓×12= (-12)×3+⅓×12= (-12)×3+4= (-36)+4= (-32)
Mam nadzieję że w jakimś stopniu pomogłam :D
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Odpowiedź:
a)¾×(-12)-⅕= (-¾)×12-⅕= (-3)×(-⅕)= (-9)-⅕= (-46/5)= 9⅕
b)1⅔×(-⅚)×(-2⅘)= 5/3×(-⅚)×(-2⅘)= 5/3×(-⅚)×(-14/5)= ⅓×5/3×7= 35/9= 3 8/9
c)-1¾×2 1/7+⅜= (-7/4)×2×1/7×3/8= (-½×⅜)= (-3/16)
d)5-2⅘×(-2,5)= 5-(14/5)-(-2,5)= 5-(14/5)×(-5/2)= 5+(14/5)×(5/2)= 5+14×½= 5+7= 12
e)-1/12×(3¾-9¼)= (-1/12)×(15/4-9¼)= (-1/12)×(15/4-37/4)= (-1/12)×(-11/2)= 1/2×11/2= 11/24
f)12:(-⅓)+⅓×12= (-12):⅓+⅓×12= (-12)×3+⅓×12= (-12)×3+4= (-36)+4= (-32)
Mam nadzieję że w jakimś stopniu pomogłam :D