Using the pattern, find the following values.
18×999
18×999=18×(1000-1)=18000-18=17,982
Hence, the value of 18×999 is 17,982.
5163-999
Study the pattern and answer the following:
18×1=18
18×2=36 (add 2 tens and 2ones less than 18i.e. 20+16)
18×3=54 (add 2 tens and 2ones less than 36i.e. 20+34)
18×4=72 (add 2 tens and 2ones less than 54i.e. 20+52)
Now, continue this pattern
18×5=.........18×6=.........18×7=.........18×8=.........18×9=.........18×10=.........