Let's solve each word problem step by step:
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Problem 1:
Alex has 13 baseball cards, and he gives 8 of them to his brother. How many baseball cards does he have left?
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Step 1: Identify the total number of baseball cards Alex starts with.
- Alex has 13 baseball cards.
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Step 2: Determine how many cards Alex gives away.
- Alex gives 8 cards to his brother.
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Step 3: Subtract the number of cards given away from the total number of cards.
- \( 13 - 8 = 5 \)
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Answer: Alex has
5 baseball cards left.
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Problem 2:
There are 16 students in a classroom, and 4 of them are absent today. How many students are present?
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Step 1: Identify the total number of students in the classroom.
- There are 16 students in total.
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Step 2: Determine how many students are absent.
- 4 students are absent.
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Step 3: Subtract the number of absent students from the total number of students.
- \( 16 - 4 = 12 \)
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Answer: There are
12 students present.
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Problem 3:
Emily has 15 colorful beads, and she wants to string them on a necklace with 4 beads on each string. How many strings of beads can she make, and how many beads will be left?
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Step 1: Identify the total number of beads Emily has.
- Emily has 15 beads.
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Step 2: Determine how many beads go into each string.
- Each string contains 4 beads.
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Step 3: Divide the total number of beads by the number of beads per string to find out how many full strings she can make.
- \( 15 \div 4 = 3 \) (quotient) with a remainder of \( 3 \).
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Step 4: Interpret the result.
- Emily can make
3 full strings.
- After making 3 strings, she will have \( 15 - (3 \times 4) = 15 - 12 = 3 \) beads left over.
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Answer: Emily can make
3 strings, and she will have
3 beads left.
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Problem 4:
There are 18 cupcakes at the school bake sale. If 7 cupcakes are chocolate, and the rest are vanilla, how many vanilla cupcakes are there?
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Step 1: Identify the total number of cupcakes.
- There are 18 cupcakes in total.
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Step 2: Determine how many cupcakes are chocolate.
- 7 cupcakes are chocolate.
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Step 3: Subtract the number of chocolate cupcakes from the total number of cupcakes to find the number of vanilla cupcakes.
- \( 18 - 7 = 11 \)
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Answer: There are
11 vanilla cupcakes.
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Final Answers:
1.
5 baseball cards left
2.
12 students present
3.
3 strings, 3 beads left
4.
11 vanilla cupcakes
\[
\boxed{5, 12, 3 \text{ strings, 3 beads left}, 11}
\]
Parent Tip: Review the logic above to help your child master the concept of mixed word problems.
