Add up everything first. Then add the tax ONCE, at the end.
All the prices added together = subtotal
subtotal × 1.06 = total with tax
You do not add tax to each item one at a time.subtotal × 1.06 = total with tax
Part A — Add It Up, Then Tax It
The Campus Store. Find the subtotal first.
1. You are buying:
🖼 Poster$6.40
☕ Mug$9.75
Subtotal — add the prices: $6.40 + $9.75 = $
Total with tax: subtotal × 1.06 = $
2. You are buying:
✨ Sticker Sheet$2.19
🔑 Keychain$3.88
🎗 Lanyard$4.35
Subtotal — add the prices: $2.19 + $3.88 + $4.35 = $
Total with tax: subtotal × 1.06 = $
3. You are buying:
👜 Tote Bag$12.50
🖊 Pen Set$5.94
Subtotal — add the prices: $12.50 + $5.94 = $
Total with tax: subtotal × 1.06 = $
Part B — More Than One of Something
Work out each line first, then the subtotal, then the tax.
4. You are buying:
✨ 3 × Sticker Sheet$2.19
🔑 2 × Keychain$3.88
3 × Sticker Sheet at $2.19 = $
2 × Keychain at $3.88 = $
Subtotal — add the lines: $
Total with tax: subtotal × 1.06 = $
5. You are buying:
☕ 2 × Mug$9.75
🎗 4 × Lanyard$4.35
2 × Mug at $9.75 = $
4 × Lanyard at $4.35 = $
Subtotal — add the lines: $
Total with tax: subtotal × 1.06 = $
Part C — How Much Was the Tax?
Take the subtotal away from the total.
6. An order had a subtotal of $16.15 and a total of $17.12.
How much of that was tax? $17.12 − $16.15 = $
7. An order had a subtotal of $36.90 and a total of $39.11.
How much of that was tax? $39.11 − $36.90 = $
Part D — Do You Know the Rule?
No adding needed — just the rule.
8. You have added up all the prices and the subtotal is $20.00. What do you do next to get the total?
9. An order has four items on it. How many times do you multiply by 1.06?
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