如果教小一生計算「20-15=?」及「15-8=?」

you can find one more people to help!! 2people=20fingers!!XD

1) tell them to open their hands
2) touch each fingers to represent
3) ask them to say how many fingers left
4) OK:)

* you may use the things they like (fingers are really boring~ dolls, sweets,cars are all OK*

P.S. remember to be kind &smile to those children, it's not easy to teach them these...Good Luck ^.^

好簡單,叫佢十隻手指當20,五隻手指當15

如果教 15 - 8，就會使用數粒，這是教 15 的組合。

如果教 20 - 15 ，則會用數柱，這是涉及退位減法。

教佢用手指計!!!!!!!!!

finger....

你教佢直式筆算lo.... ..

use pencils,rubber,candy...to teach them
e.g.if you teach them 20-15=?,you put 20candies on the desk,then,take away 15candies,next, ask them how many candies does it left?
if they can answer your question correctly, you give one candy to the children who has answer!
Hope I can help you~