Well, NOT TO WORRY. All we need is some tricks and some practice.

Here are some tricks.
(1) 
It is good to ALWAYS rearrange the positions by placing the letters on the LEFT side and numbers on the RIGHT side.
Eg 4 u - 1 u = 10 + 2

(2) 
When shifting the letter or the number, remember that if they are moving to the OPPOSITE side of the = sign, change the mathematical sign to the opposite one.
From + to - OR - to +

Eg 
5 + 4 u = 17 - 2 u
4 u + 2 u = 17 - 5

'- 2 u' becomes '+ 2 u' when it CROSSES OVER from the right to the left side of the = sign.
'+ 5' becomes '- 5' when it CROSSES OVER from the left to the right side of the = sign.

The above discussion is just THEORY. Now, let's move to some practice.
We have created 24 types of permutations from easy to hard.

Let your child try and see if they are TRUE MASTER of the UNITS statement.

To try similar questions, click url for practice:
********** http://bit.ly/ischool-ConquerTheUnitsConcept

 **********

REMEMBER: 
STUDY SMART. Aim to get a gold for speed. 
If you have them all done correctly, move on to other MASTER questions. 
We have 5000+ and growing MASTER questions for you to try. 
All come from modified top school exam papers.
Every Master question can be CLONED unlimited times until the concept CLICKS in your child's head.

Topic: Strategies
Level: Primary 6

Concepts:
Units
W Addition & subtraction

In future postings, we will be focusing on STRATEGIES and MUST-LEARN template questions.

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