Addition Methods | Adding by Parts

Adding two or more numbers can be fun and easy when done in parts - by parts I mean unit, ten, hundred,....

For example

Work out the value of 5 + 15 + 34 + 58 + 72

add the tens:                      10 + 30 + 50 + 70 = 160  (you see, 70 + 30 give 100, 10 + 50 give 60 )
add the units:               5 +  5  +   4 +   8 +  2 =   24    (5 + 5 = 10, 8 + 2 = 10: that's 20, plus 4 give 24)

Now add 160 and 24

160 + 24 = 184

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Maths is Fun ^o^