Câu hỏi liên quan
Eric had ten equal metal strips
He crewed pairs of them together into five long strips as shown below
Which strip is the shortest ?
In a park there are babies in four-wheel strollers and children on two-wheel bikes. Paula counted wheels and the total was 12. When she added the number of strollers to the number of bikes, the total was 4. How many two-wheel bikes are there in the park ?