Subtraction Within 10

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Answer Key & Explanations

Subtraction Within 10 · Grade 1 · Worksheet 3

1. You have a row of 8 circles: ○ ○ ○ ○ ○ ○ ○ ○. If you cross out 3 circles, how many circles are left? Answer: 5 Solution: Start with 8 circles Cross out 3 circles Count how many are left: 8 - 3 8 - 3 = 5 The answer is 5.
   Full step-by-step solution

   Step 1: Start with 8 circles Step 2: Cross out 3 circles Step 3: Count how many are left: 8 - 3 Step 4: 8 - 3 = 5 The answer is 5.

2. There are 7 birds sitting on a fence. You see 2 birds fly away. How many birds are left on the fence? Answer: 5 Solution: Start with the total number of birds: 7 Subtract the birds that flew away: 7 - 2 7 - 2 = 5 There are 5 birds left on the fence.
   Full step-by-step solution

   Step 1: Start with the total number of birds: 7 Step 2: Subtract the birds that flew away: 7 - 2 Step 3: 7 - 2 = 5 There are 5 birds left on the fence.

3. You see 7 circles arranged in a row. 4 circles are blue and the rest are yellow. How many yellow circles are there? Answer: 3 Solution: There are 7 circles in total. 4 of these circles are blue. To find the yellow circles, subtract the blue circles from the total: 7 - 4 7 - 4 = 3 The answer is 3 yellow circles.
   Full step-by-step solution

   Step 1: There are 7 circles in total. Step 2: 4 of these circles are blue. Step 3: To find the yellow circles, subtract the blue circles from the total: 7 - 4 Step 4: 7 - 4 = 3 The answer is 3 yellow circles.

4. There are 7 butterflies sitting on flowers in a garden. 4 butterflies fly away. How many butterflies are left on the flowers? Answer: 3 Solution: Start with 7 butterflies on the flowers. 4 butterflies fly away, so we subtract 4 from 7. 7 - 4 = 3 There are 3 butterflies left on the flowers.
   Full step-by-step solution

   Step 1: Start with 7 butterflies on the flowers. Step 2: 4 butterflies fly away, so we subtract 4 from 7. Step 3: 7 - 4 = 3 There are 3 butterflies left on the flowers.

5. There are 10 stars in a row: ★ ★ ★ ★ ★ ★ ★ ★ ★ ★. If you cross out 4 stars, how many stars are left? Answer: 6 Solution: Start with 10 stars. Cross out 4 stars. Count the stars that are not crossed out: 10 - 4 = 6.
   Full step-by-step solution

   Step 1: Start with 10 stars. Step 2: Cross out 4 stars. Step 3: Count the stars that are not crossed out: 10 - 4 = 6. The answer is 6.

6. Mason has a row of 10 star stickers: ★ ★ ★ ★ ★ ★ ★ ★ ★ ★. He gives 4 stickers to his friend Charlotte. How many star stickers does Mason have left? Answer: 6 Solution: Start with 10 star stickers. Mason gives away 4 stickers, so we subtract: 10 - 4. Count backward from 10: 10, 9 (1), 8 (2), 7 (3), 6 (4).
   Full step-by-step solution

   Step 1: Start with 10 star stickers. Step 2: Mason gives away 4 stickers, so we subtract: 10 - 4. Step 3: Count backward from 10: 10, 9 (1), 8 (2), 7 (3), 6 (4). After 4 steps, we land on 6. Step 4: 10 - 4 = 6. The answer is 6.

7. Sarah has 4 stickers. Sarah gives 3 stickers to a friend. How many stickers does Sarah have left? Answer: 1 Solution: Start with 4 stickers. Subtract the 3 stickers given away: 4 - 3 = 1.
   Full step-by-step solution

   Step 1: Start with 4 stickers. Step 2: Subtract the 3 stickers given away: 4 - 3 = 1. The answer is 1 stickers.

8. Amelia has 7 balloons. 6 balloons float away. How many balloons does Amelia have now? Answer: 1 Solution: Amelia has 7 balloons to start. Subtract the 6 balloons that floated away: 7 - 6 = 1.
   Full step-by-step solution

   Step 1: Amelia has 7 balloons to start. Step 2: Subtract the 6 balloons that floated away: 7 - 6 = 1. The answer is 1 balloons.

9. Nikau has 9 stickers. Nikau gives 2 stickers to a friend. How many stickers does Nikau have left? Answer: 7 Solution: Start with 9 stickers. Subtract the 2 stickers given away: 9 - 2 = 7.
   Full step-by-step solution

   Step 1: Start with 9 stickers. Step 2: Subtract the 2 stickers given away: 9 - 2 = 7. The answer is 7 stickers.

10. 0 - 0 = ? Answer: 0 Solution: 0 - 0 = 0. Since 0 + 0 = 0.