Solve 55*0.3+64*0.4+75*0.15+85*0.1+95*0.05

$$55 \times 0.3+64 \times 0.4+75 \times 0.15+85 \times 0.1+95 \times 0.05$$

Evaluate

$$66.6$$

Solution Steps

Multiply 55 and 0.3 to get 16.5.

$$16.5+64\times 0.4+75\times 0.15+85\times 0.1+95\times 0.05$$

Multiply 64 and 0.4 to get 25.6.

$$16.5+25.6+75\times 0.15+85\times 0.1+95\times 0.05$$

Add 16.5 and 25.6 to get 42.1.

$$42.1+75\times 0.15+85\times 0.1+95\times 0.05$$

Multiply 75 and 0.15 to get 11.25.

$$42.1+11.25+85\times 0.1+95\times 0.05$$

Add 42.1 and 11.25 to get 53.35.

$$53.35+85\times 0.1+95\times 0.05$$

Multiply 85 and 0.1 to get 8.5.

$$53.35+8.5+95\times 0.05$$

Add 53.35 and 8.5 to get 61.85.

$$61.85+95\times 0.05$$

Multiply 95 and 0.05 to get 4.75.

$$61.85+4.75$$

Add 61.85 and 4.75 to get 66.6.

$$66.6$$

Factor

$$\frac{37 \cdot 3 ^ {2}}{5} = 66\frac{3}{5} = 66.6$$