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About this game
Add 3-digit numbers: a free Grade 2 math game for ages 7-8. Kids add two 3-digit numbers. Each round brings 10 fresh questions with new numbers; instructions are read aloud and every answer is checked.
Adding 294 and 467 on paper takes a pencil, some space and two little carried ones. Add 3-digit numbers gives one sum like that per card, two numbers of at least 100 with a total of 1,000 at most. New numbers come on every card. Ten cards make a round in this Grade 2 game; your child types the total, each one checked, with a hint on each card.
Column addition works one place at a time. The hint lists the order: ones, then tens, then hundreds, and when a place makes 10 or more, regroup to the next place. In 294 + 467, the ones make 11, so 1 ten moves over; the tens then make 16, so 1 hundred moves over. That trade of ten for one is the heart of place value.
Regrouping is easy to forget. Adding each column on its own gives 651 for 294 + 467, with both carried ones lost. Ask, "Where did the extra ten from the ones go?" Then write the little 1 above the tens. End with, "You moved the extra ten over."