Have children write and recite the answers to the following equations until they can give the answers instantly.

9+1 or 1+9= ; therefore 10-1= ; 10-9=

8+2 or 2+8= ; therefore 10-2= ; 10-8=

7+3 or 3+7= ; therefore 10-3= ; 10-7=

6+4 or 4+6= ; therefore 10-4= ; 10-6=

5+5= ; therefore 10-5=

Follow the step-by-step instructions below to teach the lesson.

Children progress to Ray's Primary Arithmetic (first grade math) when they master the current lesson to the instructor's satisfaction.

Value mastery over speed of progression.

STEP 1

Have children recite and solve each equation listed below.

STEP 2

Have children copy on paper the equations listed below and their solutions.

EQUATIONS

- 9+1 or 1+9= ; therefore 10-1= ; 10-9=
- 8+2 or 2+8= ; therefore 10-2= ; 10-8=
- 7+3 or 3+7= ; therefore 10-3= ; 10-7=
- 6+4 or 4+6= ; therefore 10-4= ; 10-6=
- 5+5= ; therefore 10-5=

Repeat this lesson every day until children can easily recite and write the equations and their solutions.