Which strategy can be used to solve this problem?
Marta has 5 more dimes than quarters. She has twice as many nickels as quarters. Marta has $2.00 in dimes.
How much money does Marta have altogether?
A.
Draw a diagram
Draw 3 large squares. In the first square draw 20 small circles and write 10 inside each circle. In the second square draw 2 circles. Write 5 inside each circle. In the third square draw 5 larger circles. Write 25 inside each. Add up the amounts inside all the circles.
B.
Guess and test.
Guess that Marta has 10 quarters. Subtract 5 to find the number of dimes (5). Ask if 5 dimes equals $2.00. If not, revise the number of quarters. Repeat the process until the dimes equal $2.00. Use the number of quarters to calculate the amount of money Marta has in quarters.
C.
Work Backward.
Start with finding out the number of dimes Marta has (20). Subtract 5 to find the number of quarters (15). Multiply 15 by 2 to find the number of nickels (30). Calculate the dollar amounts for nickels and quarters and add this amount to $2.00.