SHIFTING A QUANTITY FROM ONE NUMBER TO THE OTHER TO CREATE DOUBLES BS 3

OBJECTIVE:By the end of the lesson, the learner will be able to use the shift method to create Doubles.

      Example 1:
   
       34+36=
  Shift 1 from 36 to 34 .34 becomes 34+1=35 and 36 becomes 36-1=35.
Add the new sums.
34+36=70
35+35=70

    Example 2:

13+15=

Solution

13+1=14
15-1=14
13+15=48
14+14=48
 
      Example 3:
     
       38+36=

       Solution

       36+1=37
       38-1=37
       36+38=74
       37+37=74

EXERCISE

Solve the following using the shift method

1. 13+15=

2.33+35=

3.26+24=

4.35+37=

5.21+23=

6.15+17=

7.38+40=

8.43+41=
 
    STAY BLESS