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Equivalence (additive) - If the same numbers is added to or subtracted from both sides of an equation, equality is maintained.
Activity 1: Play this online game
Activity 2: Balance these equtions
8 + ___ = 17 + 3
62 - 42 = 78- ___
100 + 22 = 86 + ___
56 + ___ = 82 + 27
42 + ___ = 99-13
87- ___ = 22 + 45
Make up 3 balanced equations of your own
Activity 3: Solve these sums. Show all your working
10= x + 6
8x = 48
x -12= 1
11= x- 4
x-19= 2
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