What is 10-12+3(-15)-21\div 7 ?

The solution to 10-12+3(-15)-21\div 7 is -50

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10-12+3(-15)-21\div 7

10 - 12 + 3 (- 15) - 21 \div 7

- 50

Solution steps

10 - 12 + 3 (- 15) - 21 \div 7

Follow the PEMDAS order of operations

Multiply and divide (left to right)

3 (- 15) : - 45

3 (- 15)

Apply rule

a \cdot (- b) = - a \cdot b

3 (- 15) = - 3 \cdot 15 = - 45

= - 45

= 10 - 12 - 45 - 21 \div 7

Multiply and divide (left to right)

21 \div 7 : 3

21 \div 7

21 \div 7 = 3

= 3

= 10 - 12 - 45 - 3

Add and subtract (left to right)

10 - 12 - 45 - 3 : - 50

10 - 12 - 45 - 3

10 - 12 = - 2

= - 2 - 45 - 3

- 2 - 45 = - 47

= - 47 - 3

- 47 - 3 = - 50

= - 50

= - 50

- (- 2 - 6)

(1025 - 8 \times 125) \div 5

8^{2} \cdot 7^{2}

10 - 5 + (7 - 2) \cdot 4

5 \times + \frac{35}{50}