Adding and subtraction fractions should begin with students using prior knowledge of equivalent fractions.Identify the problem that may be more challenging to solve mentally.
A)Luke ordered 3 pizzas.But before his guests arrive he got hungry and ate 38 of one pizza.What was left for the party?
B)Linda ran 1 12 miles on Friday.Saturday she ran 2 18 miles and Sunday 2 34.How many miles did she run over the weekend?
C)Lois gathered 34 pounds of walnuts and Charles gathered 78 pounds.Who gathered the most? How much more?
D)Estimate the answer to 1213+ 78.

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The Answer of Adding and subtraction fractions should begin with students using prior knowledge of equivalent fractions.Identify the problem that may be more challenging to solve mentally.
A)Luke ordered 3 pizzas.But before his guests arrive he got hungry and ate 38 of one pizza.What was left for the party?
B)Linda ran 1 12 miles on Friday.Saturday she ran 2 18 miles and Sunday 2 34.How many miles did she run over the weekend?
C)Lois gathered 34 pounds of walnuts and Charles gathered 78 pounds.Who gathered the most? How much more?
D)Estimate the answer to 1213+ 78.

Adding and Subtraction Fractions Should Begin with Students Using Prior