First, let's solve the expression inside the parentheses:
2 1/10:2-1,8
Convert 2 1/10 to an improper fraction:
2 1/10 = (2*10 + 1) / 10 = 21/10
Now, let's divide 21/10 by 2:
21/10 ÷ 2 = (21/10) * (1/2) = 21/20
Now, let's subtract 1,8 from 21/20:
21/20 - 1,8 = 21/20 - 1.8
Convert 1.8 to a fraction:
1.8 = 1 + 8/10 = 1 + 4/5 = 9/5
Now subtract:
21/20 - 9/5 = (215 - 920) / (20*5) = (105 - 180) / 100 = -75/100 = -3/4
Now, let's continue with the expression:
(-3/4) × 0.4 + 0.3
Multiply -3/4 by 0.4:
(-3/4) × 0.4 = -3/10
Finally, add 0.3:
-3/10 + 0.3 = -3/10 + 3/10 = 0
So, (2 1/10:2-1,8)×0,4+0,3 = 0.
First, let's solve the expression inside the parentheses:
2 1/10:2-1,8
Convert 2 1/10 to an improper fraction:
2 1/10 = (2*10 + 1) / 10 = 21/10
Now, let's divide 21/10 by 2:
21/10 ÷ 2 = (21/10) * (1/2) = 21/20
Now, let's subtract 1,8 from 21/20:
21/20 - 1,8 = 21/20 - 1.8
Convert 1.8 to a fraction:
1.8 = 1 + 8/10 = 1 + 4/5 = 9/5
Now subtract:
21/20 - 9/5 = (215 - 920) / (20*5) = (105 - 180) / 100 = -75/100 = -3/4
Now, let's continue with the expression:
(-3/4) × 0.4 + 0.3
Multiply -3/4 by 0.4:
(-3/4) × 0.4 = -3/10
Finally, add 0.3:
-3/10 + 0.3 = -3/10 + 3/10 = 0
So, (2 1/10:2-1,8)×0,4+0,3 = 0.