Addition strategies

We have been practising our mental math strategies. These are ways we can solve problems involving 2-digit numbers without having to rely on our fingers, manipulatives, calculators, or even paper (everything should be done in our heads). Adding 20 to 30 is easy because it is only having to add the tens (2+3). Adding 20 + 36 is similar because we can just add 20 to 30 again, but add the extra 6 as well. This can now help if you have a problem like 19 + 36. We know 19 is one less than 20, so therefore the answer will also be one less than 20 + 36. Having your child get used to such a strategy can help with their mental math.