Ask Edison what are the questions that he hate most in Mathematics, he’ll say “more than” and “less than”. More often than not, lower primary students are baffled by this type of questions. ____ is 225 less than 500. 535 is ____ more than 353. 507 is 11 tens less than ____. In fact, he started learning this type of questions since Primary 1 with addition and subtraction up to…