Page 29 - Math E. Booklet prim 4 (first term 2025)_Neat

Bar models , variable & Story Problems

First: Bar models

Whole The sum of two parts “part 1+ part 2” is equal to the whole

Part 1 Part 2

For Example

20 350 100
8 + 12 50 + 300 80 + 20

Second: the equation

It is a mathematical expression contains unknown number

Equation Unknown Unknown value
Y +4 = 10 Y =10 - 4 Y=6
X– 2=3 X =3 +2 X=5
8– x=7 X=8– 7 X=1

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