Let’s solve each problem step by step using the GEMDAS rule:
GEMDAS stands for:
-
Grouping (parentheses, brackets, braces)
-
Exponents
-
Multiplication and
Division (from left to right)
-
Addition and
Subtraction (from left to right)
---
1. 90 ÷ (3 x 3) - 3²
Step 1: Solve inside parentheses → 3 x 3 = 9
→ 90 ÷ 9 - 3²
Step 2: Exponent → 3² = 9
→ 90 ÷ 9 - 9
Step 3: Division → 90 ÷ 9 = 10
→ 10 - 9
Step 4: Subtraction → 10 - 9 =
1
✔ Answer:
1
---
2. 8 x 4 ÷ 2 + (15 ÷ 5) - 4²
Step 1: Parentheses → 15 ÷ 5 = 3
→ 8 x 4 ÷ 2 + 3 - 4²
Step 2: Exponent → 4² = 16
→ 8 x 4 ÷ 2 + 3 - 16
Step 3: Multiplication and Division left to right →
8 x 4 = 32 → 32 ÷ 2 = 16
→ 16 + 3 - 16
Step 4: Addition and Subtraction left to right →
16 + 3 = 19 → 19 - 16 =
3
✔ Answer:
3
---
3. {(15 - 3 x 3) - (18 ÷ 9)} + 10²
Step 1: Innermost grouping — first parentheses:
Inside { }:
First part: 15 - 3 x 3 → multiplication first: 3 x 3 = 9 → 15 - 9 = 6
Second part: 18 ÷ 9 = 2
So: {6 - 2} = 4
Step 2: Exponent → 10² = 100
→ 4 + 100 =
104
✔ Answer:
104
---
4. 100 - 45 ÷ 3 x 3² + 56
Step 1: Exponent → 3² = 9
→ 100 - 45 ÷ 3 x 9 + 56
Step 2: Division and Multiplication left to right →
45 ÷ 3 = 15 → 15 x 9 = 135
→ 100 - 135 + 56
Step 3: Addition and Subtraction left to right →
100 - 135 = -35 → -35 + 56 =
21
✔ Answer:
21
---
5. 6² ÷ 3 x 4 - 28 + (7 + 3)
Step 1: Parentheses → 7 + 3 = 10
→ 6² ÷ 3 x 4 - 28 + 10
Step 2: Exponent → 6² = 36
→ 36 ÷ 3 x 4 - 28 + 10
Step 3: Division and Multiplication left to right →
36 ÷ 3 = 12 → 12 x 4 = 48
→ 48 - 28 + 10
Step 4: Addition and Subtraction left to right →
48 - 28 = 20 → 20 + 10 =
30
✔ Answer:
30
---
6. 60 ÷ (5 x 2) + 4³
Step 1: Parentheses → 5 x 2 = 10
→ 60 ÷ 10 + 4³
Step 2: Exponent → 4³ = 64
→ 60 ÷ 10 + 64
Step 3: Division → 60 ÷ 10 = 6
→ 6 + 64 =
70
✔ Answer:
70
---
7. 120 ÷ 12 x 5 ÷ 2 - 4
No grouping or exponents → go left to right for multiplication/division.
Step 1: 120 ÷ 12 = 10
→ 10 x 5 = 50
→ 50 ÷ 2 = 25
→ 25 - 4 =
21
✔ Answer:
21
---
8. 95 - 24 ÷ (8 x 3) + 2⁴
Step 1: Parentheses → 8 x 3 = 24
→ 95 - 24 ÷ 24 + 2⁴
Step 2: Exponent → 2⁴ = 16
→ 95 - 24 ÷ 24 + 16
Step 3: Division → 24 ÷ 24 = 1
→ 95 - 1 + 16
Step 4: Left to right → 95 - 1 = 94 → 94 + 16 =
110
✔ Answer:
110
---
9. 9 x 12 ÷ 3 + 5 - 15
Left to right for multiplication/division:
Step 1: 9 x 12 = 108
→ 108 ÷ 3 = 36
→ 36 + 5 = 41
→ 41 - 15 =
26
✔ Answer:
26
---
10. (36 ÷ 9 + 14) ÷ 9 + 12 - 10
Step 1: Inside parentheses → 36 ÷ 9 = 4 → 4 + 14 = 18
→ 18 ÷ 9 + 12 - 10
Step 2: Division → 18 ÷ 9 = 2
→ 2 + 12 - 10
Step 3: Left to right → 2 + 12 = 14 → 14 - 10 =
4
✔ Answer:
4
---
Final Answer:
1. 1
2. 3
3. 104
4. 21
5. 30
6. 70
7. 21
8. 110
9. 26
10. 4
Parent Tip: Review the logic above to help your child master the concept of order of operations 6th grade worksheet.