Solve 4.5*8+5.5*21+6.5*31+7.5*23+8.5*10+9.5*5+10.5*2

$$4.5 \times 8+5.5 \times 21+6.5 \times 31+7.5 \times 23+8.5 \times 10+9.5 \times 5+10.5 \times 2$$

Evaluate

$$679$$

Solution Steps

Multiply 4.5 and 8 to get 36.

$$36+5.5\times 21+6.5\times 31+7.5\times 23+8.5\times 10+9.5\times 5+10.5\times 2$$

Multiply 5.5 and 21 to get 115.5.

$$36+115.5+6.5\times 31+7.5\times 23+8.5\times 10+9.5\times 5+10.5\times 2$$

Add 36 and 115.5 to get 151.5.

$$151.5+6.5\times 31+7.5\times 23+8.5\times 10+9.5\times 5+10.5\times 2$$

Multiply 6.5 and 31 to get 201.5.

$$151.5+201.5+7.5\times 23+8.5\times 10+9.5\times 5+10.5\times 2$$

Add 151.5 and 201.5 to get 353.

$$353+7.5\times 23+8.5\times 10+9.5\times 5+10.5\times 2$$

Multiply 7.5 and 23 to get 172.5.

$$353+172.5+8.5\times 10+9.5\times 5+10.5\times 2$$

Add 353 and 172.5 to get 525.5.

$$525.5+8.5\times 10+9.5\times 5+10.5\times 2$$

Multiply 8.5 and 10 to get 85.

$$525.5+85+9.5\times 5+10.5\times 2$$

Add 525.5 and 85 to get 610.5.

$$610.5+9.5\times 5+10.5\times 2$$

Multiply 9.5 and 5 to get 47.5.

$$610.5+47.5+10.5\times 2$$

Add 610.5 and 47.5 to get 658.

$$658+10.5\times 2$$

Multiply 10.5 and 2 to get 21.

$$658+21$$

Add 658 and 21 to get 679.

$$679$$

Factor

$$7\times 97$$