Question

1. 200 ÷ 63 + 7 − 5(17 − 7)
2. 37.5 − 2(3.2)
3. 6(4.6 + 3.2) + 8.9 + 2.1 − 2.7

Explanation:

Step1: Solve innermost parentheses (Q8)

$17-7=10$

Step2: Multiply (Q8)

$5\times10=50$

Step3: Add and subtract (Q8)

$63+7-50=20$

Step4: Divide (Q8)

$200\div20=10$

Step5: Solve innermost multiplication (Q9)

$2\times3.2=6.4$

Step6: Subtract inside brackets (Q9)

$7.5-6.4=1.1$

Step7: Multiply (Q9)

$3\times1.1=3.3$

Step8: Add inside parentheses (Q10)

$4.6+3.2=7.8$

Step9: Multiply (Q10)

$6\times7.8=46.8$

Step10: Add remaining terms (Q10)

$46.8+8.9+2.1=57.8$

Step11: Subtract final term (Q10)

$57.8-2.7=55.1$

Answer:

1. $10$
2. $3.3$
3. $55.1$