0.4×(3+1)= 0.4 \times (3+1) = 0.4×(3+1)=
First, calculate the expression inside the parentheses: 3+1 3 + 1 3+1 equals 4 4 4.
Then multiply 0.4 0.4 0.4 by 4 4 4 to get 1.6 1.6 1.6.
1.6