Question

Запишите без скобок и упростите выражение: 1) 5a+(-8b)+(-7c)+(-2a)+3b+c; 2)3n+6m+(-15k)+(-n)+(-5m)+8k; 3)8.2a+(-4b)+10.3c+(-4a)+(-9.5b)+(8c).

Answer 1

1)5a-8b-7c-2a+3b+c=3a-5b -6c
2)3n+6m-15k-n-5m+8k=2n+m-7k
3)8.2a-4b+10.3c-4a-9.5b+8c=4.2a-13.5b+18.3c

Answer 2

1. 5a - 8b - 7c - 2a + 3b + c

Simplifying the expression: Combine like terms: (5a - 2a) + (-8b + 3b) + (-7c + c) 3a - 5b - 6c

So the simplified expression is 3a - 5b - 6c.

2. 3n + 6m - 15k - n - 5m + 8k

Simplifying the expression: Combine like terms: (3n - n) + (6m - 5m) + (-15k + 8k) 2n + m - 7k

So the simplified expression is 2n + m - 7k.

3. 8.2a - 4b + 10.3c - 4a - 9.5b + 8c

Simplifying the expression: Combine like terms: (8.2a - 4a) + (-4b - 9.5b) + (10.3c + 8c) 4.2a - 13.5b + 18.3c

So the simplified expression is 4.2a - 13.5b + 18.3c.