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2
Addition
LEARNING ObjEctIvEs
After studying this chapter, students will be able to...
y add 3-digit numbers without and with regrouping
y add 4-digit numbers without and with regrouping
y evaluate and estimate the sum
y solve word problems based on addition
21 st
Century #Life Skills and Values
Skills
Warm Up Building of Hundreds
A courier boy has to deliver parcels in an apartment complex.
The numbering of buildings and flats is as follows:
The apartment building with flats 0–99 is termed as the ZERO BUILDING.
The building with flats 100-199 is termed as the ‘100 BUILDING’.
The building with flats 200-299 is termed as the ‘200 BUILDING’
and so on. The last building is the ‘900 BUILDING’.
The flat numbers are written in different ways on the parcels.
3 flats 10 flats 10 flats 15 flats A flat just
100 + 9
after 379 above 638
after 540 after 220 after 725
37
Addition
