In this post, we will show you how to do Additions Mentally. Have a look at the Following Examples........
- 342 + 557 + 629 + 746 + 825 = ?
- When we are adding three-digit numbers, first add-two-digits at a time (Units and Tens Place).
- 42 + 57 + 29 +| 46 + 25 = 199
- To add 42 and 57, mentally treat 57 as 50 + 7 ( Because 50 would facilitate quick addition)
- So, 42 + 57 = (42 + 50) + 7 = 92 + 7 = 99
- Similarly, 99 + 29 = (99 + 20_ + 9 = 128
- 128 + 46 = (128 + 40) + 6 = 174
- 174 + 25 = (174 + 20) + 5 = 199
- The last two digits (the units place and the tens place)
No comments:
Post a Comment