Game: FOUR IN A ROW
Aim: To get four symbols in a row
Method:
Choose a square and click on it. Click on the correct answer to the question in the box that appears. If you are right the square is replaced by a tick. Continue until you have won 4 in a row...
5th grade / Add + Subtract / Add 109, 119, 129 / Add 129 to a multiple of 10
When you add to a large number, you can use simple tricks to help you. This is especially so when the large number's unit value is a 9 or a 1.
When adding 129, it is often easier to first add 130, and then subtract 1.
For instance, if you wanted to do the sum 160 + 129:
160 + 129 = (160 + 130) - 1
290 - 1 = 289
Of course, this trick also works when the initial number is not a multiple of 10:
164 + 129 = (164 + 130) - 1 = 294 - 1
You can use a similar technique whenever the number to be added has a unit value of 9 - round that number up to nearest 10, do the addition then take 1 away. If you practice this technique using some of our timed games, you will soon get very good at doing this in your head in a very short time.
With our Four in a row math game you will be practicing the topic "Add 129 to a multiple of 10" from 5th grade / Add + Subtract / Add 109, 119, 129. The math in this game consists of 28 questions that ask you to add 129 to a number by first adding 130 and then subtracting 1 from the result.
The game will reinforce the math you have chosen to learn by getting you to match the question to the correct answer.
Notes
UXO * Duck shoot * The frog flies * Pong * Cat and mouse * The beetle and the bee
Rock fall * Four in a row * Sow grow * Choose or lose * Mix and match
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