The student must be able to add two whole numbers whose sum is less than 20 and subtract related facts in a similar manner. They must be able to apply basic fact strategies, including combining or breaking apart two numbers to form a sum of ten and must be efficient in using the basic facts to solve problems arising in everyday life.
Write a number sentence and share your thinking about how you solved the problem. You will need paper and pencil.
a) Sam has 8 pennies in his hand and 6 pennies on the table. How many pennies does Sam have?
b) Mrs. Kennedy baked 15 loaves of bread for the party. Six loaves were burnt, so she threw them away. She brought the remaining loaves to the party. How many loaves of bread did she bring to the party?
Click on the following links for interactive games.
Click on the following links for more information.
1.3 Number and operations. The student applies mathematical process standards to develop and use strategies for whole number addition and subtraction computations in order to solve problems. The student is expected to:
(D) apply basic fact strategies to add and subtract within 20, including making 10 and decomposing a number leading to a 10