tricks for fast decimals

here addition to decimal

add them up and down with laft or right side

step3

omit the points

step4

if we are gonna add 78.3+2.031+2.3245+9.2

take points is one place

step5

add them

step6

let’s take another example with 0.004+6.32+1.008+3.452

step7

let’s take another example

step8

now tried to subtraction with decimals

if there is 00 so you have to subtract with 9,10

if its 0000 so you have to subtract with 99910

like that

step9

step10

you should add 0 for safety purposes

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