Let me work through each problem step by step.
Problem 1:
Johnson wants to make 1,500 cars total. He has already made 492. He makes 18 cars per day. How many more days does he need?
Step 1: Find how many more cars Johnson needs to make.
1,500 - 492 = 1,008 cars remaining
Step 2: Divide the remaining cars by the number he makes per day.
1,008 ÷ 18 = ?
Let me calculate: 18 × 50 = 900, 18 × 6 = 108, so 18 × 56 = 1,008.
So 1,008 ÷ 18 = 56
Answer: 56 days
Problem 2:
Bill and his 3 friends read 55 books each. Each book has an average of 320 pages. How many pages did they all read in total?
Step 1: Find total number of people.
Bill + 3 friends = 4 people
Step 2: Find total books read.
4 people × 55 books each = 220 books
Step 3: Find total pages.
220 books × 320 pages per book = ?
220 × 320 = 220 × 300 + 220 × 20 = 66,000 + 4,400 = 70,400
Answer: 70,400 pages
Problem 3:
Mary invited 14 friends. She made 190 cookies. She wants to save 22 for her parents. How many cookies will each person get at the party?
Step 1: Find how many cookies are available for the party.
190 - 22 = 168 cookies for the party
Step 2: Find total number of people at the party.
14 friends + Mary herself = 15 people
Wait, let me reconsider. The question says "each person" at the party. Mary is having the party and she invited 14 friends. So there are 14 friends + Mary = 15 people total at the party.
Step 3: Divide cookies among people.
168 ÷ 15 = ?
15 × 11 = 165, remainder 3. So 168 ÷ 15 = 11 with remainder 3.
Hmm, that doesn't divide evenly. Let me reconsider whether Mary is included.
Actually, re-reading: "How many cookies will each person get at the party?" - this likely means each of the 14 friends (the guests). But it could also include Mary.
If it's just the 14 friends: 168 ÷ 14 = 12. That divides evenly!
So the answer is probably 12 cookies per person (just the 14 friends).
Actually, I think the standard interpretation here is that "each person" refers to the 14 friends who were invited. Mary made the cookies and is hosting, but the sharing is among the guests. Or it could include Mary too.
Given that 168 ÷ 14 = 12 exactly, and 168 ÷ 15 doesn't divide evenly, I'll go with 14 people (just the friends), giving 12 cookies each.
Answer: 12 cookies per person
Problem 4:
Eli had 624 cards to give away to 12 friends. How many cards would each friend receive?
624 ÷ 12 = ?
12 × 50 = 600, 12 × 2 = 24, so 12 × 52 = 624.
Answer: 52 cards per friend
Let me verify all calculations once more:
1. 1,500 - 492 = 1,008; 1,008 ÷ 18 = 56 ✓
2. 4 × 55 = 220; 220 × 320 = 70,400 ✓
3. 190 - 22 = 168; 168 ÷ 14 = 12 ✓
4. 624 ÷ 12 = 52 ✓
All answers check out.
Final Answer:
1. 56 days
2. 70,400 pages
3. 12 cookies
4. 52 cards
Parent Tip: Review the logic above to help your child master the concept of 5th grade word problems worksheet.
