Ray's New Primary Arithmetic by Joseph Ray Ray's New Primary Arithmetic by Joseph Ray    

Lesson 27: Add Numbers Up to 70

Directions

Teach children to add numbers up to total of 70.

Have children practice until they perfectly master the task.

Steps

STEP 1

• Instructors display the table below.
• Children copy problems from the table, solve the problems, and write the answers.

STEP 2

• Instructors and children review the solutions.
• Children correct any mistakes.
• Special drill should be given to those combinations by which the addition of the digit carries the total into the ten next higher than the number to which the digit is added.
• Continue until children master all equations.