3. Розкрийте дужки:
a) 10a+(4-4a)
6) 23-(5,3-4,7)
B) (14,2-5)-(12,2-5)
r) (n-m)-(-2,4p)
a) 10a+(4-4a)
6) 23-(5,3-4,7)
B) (14,2-5)-(12,2-5)
r) (n-m)-(-2,4p)
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Ответ:
a) 10a + (4 - 4a) = 10a + 4 - 4a = 6a + 4
b) 23 - (5,3 - 4,7) = 23 - 0,6 = 22,4
c) (14,2 - 5) - (12,2 - 5) = 9,2 - 7,2 = 2
d) (n - m) - (-2,4p) = n - m + 2,4p