4.1.4. Operations on Large Numbers

A housewife's income is 800LE. She wants to buy 6 cups for the house and 16 shirts for kids in a nearby orphanage. If the price of one cup is 7LE and the price of one shirt is 18LE, calculate the amount of money the housewife can save from her income after buying the needed shirts and cups.

• A470LE
• B578LE
• C220LE
• D222LE

Example

A housewife's income is 800LE. She wants to buy 6 cups for the house and 16 shirts for kids in a nearby orphanage. If the price of one cup is 7LE and the price of one shirt is 18LE, calculate the amount of money the housewife can save from her income after buying the needed shirts and cups.

Solution

To find how much the housewife can save, break this problem into steps to make it easier to solve: first find the total amount she paid for all the items, and then subtract that amount from her income.

Multiply to find the cost of the cups: .

Multiply to find the cost of the shirts: .

Add those two costs to find the total amount paid: .

Then subtract the total amount paid from the housewife's income to find how much she can save: .

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