Should my child memorize addition facts or work them out?

Both, in that order. Working them out with counting on and making ten is how the facts get understood, and repetition is how they become instant, which is what frees a child to think about the actual problem rather than the arithmetic inside it. This game asks only for sums of two single-digit numbers, so the same facts come round often enough to start sticking.

My first grader still counts on fingers. Is that a problem?

Not at all at this stage, and it is much better than guessing. Fingers are a real strategy that works, and most children drop them on their own as the facts become familiar, starting with doubles and the ten pairs. It is only worth nudging if a child is still counting every sum from one late in second grade, which usually means the ten bonds need attention.

How big are the sums in this game?

Both numbers are between one and nine, so every total lands between two and eighteen. That is the standard addition-within-twenty range for kindergarten through second grade, and it covers the facts that later methods lean on, including the awkward ones that cross ten like eight plus seven.

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Addition Pop

Pop the balloon with the answer.

Grades K-2 · Addition facts within twenty

How to play

1A sum appears, like 7 + 5.
2Pop the balloon showing the correct total.
3If you are unsure, start from the bigger number and count on.
4Keep your streak going for a high score.

Try a few

7 + 5
Answer: 12
Counting on from seven works, but the faster move is to make a ten first. Seven needs three more to reach ten, so take three of the five: seven plus three is ten, and two of the five are still waiting, so ten plus two is twelve. The reason this is worth teaching is that it turns a hard fact into two easy ones, and the same trick will later handle 27 plus 5 without any new learning.
9 + 6
Answer: 15
Nine is one away from ten, so borrow one from the six. Nine plus one is ten, and five of the six are left, so the total is fifteen. Every fact with a nine in it behaves the same way, and that is why nines are worth learning first: once a child knows nine plus something is always ten plus one less, half the tricky sums in this game stop being tricky.
3 + 8
Answer: 11
Swap the order before you start. Three plus eight and eight plus three give the same total, and counting on three from eight is three quick hops while counting on eight from three is eight chances to lose your place. Say eight, then hop: nine, ten, eleven. Starting from the bigger number is a habit worth building early, because it halves the work on about half the sums here.

Why this game helps

Every child adds by counting at first, and that is exactly right, but counting one-by-one from the start stays slow and error-prone, and it quietly caps how far they can go. The bridge to fluency is counting on from the larger number, and then recalling the fact outright: knowing 7 + 5 is 12 without a lap around your fingers. Quick rounds of familiar sums, with the pressure kept light, are how those facts move from worked-out to remembered, which is what frees a child’s attention for the harder thinking that addition is supposed to serve.

If your child finds this hard

If the answers are landing one away from correct, the cause is almost always in how the counting on is done. It is worth naming directly: the child counts the starting number as the first hop. Asked for 7 plus 5 they say seven, eight, nine, ten, eleven, five numbers said, and answer eleven. They have counted carefully and still got it wrong, so telling them to be more careful will not help.

Fix it by making the hops something you can hear and see. Say the starting number once, firmly, then tap the table for each hop: seven, then tap tap tap tap tap while saying eight, nine, ten, eleven, twelve. The rule is that the first number is where you stand, not a step you take. A few rounds of tapping usually clears it, and it is worth doing away from the screen where there is no clock running.

The other documented slip shows up once children start making tens: they get to ten and forget the leftovers, so 8 plus 5 comes out as ten, or as twelve because only one of the leftovers came along. An empty egg carton is the cure, since it holds ten. Put in eight eggs or eight stones, then add five one at a time. Two fill the carton and three sit outside it, and the child can see that the answer is a full ten plus the three still on the table.

Common questions

Should my child memorize addition facts or work them out?: Both, in that order. Working them out with counting on and making ten is how the facts get understood, and repetition is how they become instant, which is what frees a child to think about the actual problem rather than the arithmetic inside it. This game asks only for sums of two single-digit numbers, so the same facts come round often enough to start sticking.
My first grader still counts on fingers. Is that a problem?: Not at all at this stage, and it is much better than guessing. Fingers are a real strategy that works, and most children drop them on their own as the facts become familiar, starting with doubles and the ten pairs. It is only worth nudging if a child is still counting every sum from one late in second grade, which usually means the ten bonds need attention.
How big are the sums in this game?: Both numbers are between one and nine, so every total lands between two and eighteen. That is the standard addition-within-twenty range for kindergarten through second grade, and it covers the facts that later methods lean on, including the awkward ones that cross ten like eight plus seven.

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