Page 22 - Math E. Booklet prim 4 (first term 2025)_Neat

Properties of the addition

FFiirrsstt::NNeueturatlraEllemEelentment
The additive neutral element is zero
So, the sum of any number and zero is equal

the same number

For example,

365 + 0 = 365 , 0 + 800 = 800 ,

152,487 + 0 = 152,487 , 34 + 0 = 34

Second: Commutative

If a and b two numbers, then a + b is the same b
+a“a+b=b+a”

For example,

45 + 3 = 48 ,3 + 45 = 48

847 + 120 = 967 , 120 + 847 = 967

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