Reteach and Skills Practice Workbook

10–6
Name
Date
Reteach
Problem-Solving Investigation (continued)
4MR2.0, 4MG3.0
Use any method shown below to solve. Tell what method
you used.
• Work backward
• Reasonable answers
• Act it out
• Guess and check
• Look for a pattern
1. A farmer has cows and chickens. Juan counted 296 legs in the
farmyard. If there are 100 animals, how many are cows and how
many are chickens?
Strategy:
2. Melissa has $20. She earns $9 a week babysitting. Is it reasonable
to say she will be able to buy a bike that costs $150 in 15 weeks?
Strategy:
3. Drew bought his lunch for $6. Then he paid $8 for admission to the
skate park. Then he paid $3 to ride the bus home. Now he has $2.
How much money did Drew start with?
Strategy:
4. Abby paid for lunch with $15. She got back $4. If her salad cost $3,
and her water cost $2, how much was the turkey sandwich?
Strategy:
5. Colin sold muffins for the school’s bake sale. He sold each muffin
for $2. If he earned $48, how many muffins did he sell?
Strategy:
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Grade 4 186 Chapter 10