63) Near Double
Doubling and Halving to 20: Strategy Fluency
Mathematics
To develop fluency using the strategy of near double addition, adding one more than the double bonds of 6, 7, 8, 9.
Prior knowledge of double bonds 6, 7, 8, 9 and the commutative property of addition is needed.
Language
- double bond
- near double
- one more
- addition as “add”
- equals
Differentiation
A little easier
Part-Part-Whole representation
Place Bond Blocks on the part-part-whole frame to calculate the near double. For example,
Progression
After completing Bond Block activities to this point students have partitioned two-digit wholes to 20 using place value and double bonds. The next chapter of activities focuses on the remaining two-part, single-digit bonds. For example, 15 as 9 and 6. Go to
Activity 64
Bonds of 11 to 20: Addition, Lulu