Juan has $1,250 saved and his brother gives him $350. How much money does Juan have in total?
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Explanation: Juan’s brother gives him money, so the amount must be added, and in order not to make a line with many numbers, it can be done from \(50\) to \(50\). The first amount is located \((1250)\) and it is advanced \(7\) times, which corresponds to a total of \(350\) to obtain the result.
Procedure:
Answer:
The total amount of money that Juan has is \($1,600\)
Problem 2
22 players were invited to a football match and a total of 27 players attended. How many players attended without an invitation?
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Explanation: Since more players attended than those invited, you must subtract to find out how many showed up without being invited. You can make a number line from \(1\) to \(1\), locate the total number of players \((27)\) and go back \(22\) times (invited players) to get the result.
Procedure:
Answer:
Five players attended without invitation.
Problem 3
Hernando harvested 90 heads of lettuce and his partner Nancy harvested 150 heads of lettuce. How many heads of lettuce did they harvest in total?
🔍 See solution
Explanation: The total number of lettuces between Hernando and Nancy must be calculated, so the quantities must be added. To do this, a number line is made from \(30\) to \(30\), locating \(90\) (the number of lettuces for Hernando) and moving forward \(5\) times to add Nancy’s \(150\), obtaining the answer.
Procedure:
Answer:
Between Hernando and Nancy they harvested a total of \(240\) lettuces.
Problem 4
Franco has bought 320 apples for a walk with his community, but his mother has given 100 to his church for an activity. How many apples did Franco have left?
🔍 See solution
Explanation: Since the mother removed apples, that amount must be subtracted from the total. To do this, you can make a number line from \(20\) to \(20\), locate yourself at \(320\) and go back \(5\) times, which corresponds to the \(100\) apples removed.
Procedure:
Answer:
Franco had 220 apples left for the walk with his community.
Problem 5
Aylín is 6 years old, 7 years younger than her cousin Antonella. How old is Antonella?
🔍 See solution
Explanation: Aylín’s \(6\) years must be added to Antonella’s \(7\) years to calculate her age. Since the numbers are small, a number line is made from \(1\) to \(1\).
Procedure:
Answer:
Antonella is \(13\) years old.
Here we end the 5 solved problems of addition and subtraction of natural numbers on the number line. To see more content on the topic, I invite you to see the 🔗 available resources.
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