Adding and Subtracting 9 MENTAL MATH for Kids Episode 4

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Adding and Subtracting 9 MENTAL MATH for Kids Episode 4

النص الكامل للفيديو

smile and learn Hello friends remember me I'm back from Venus to show you some amazing tricks that will help you add and subtract really fast are you ready to become mental math star today we'll learn how to add and subtract nine with few little tricks here we go how many martians are there on two spaceships if there are 12 on one and nine on the other let's start by learning the trick to add nine quickly we're going to add 12 + 9 so first we're going to add 10 martians to the 12 on the other ship now we have 22 easy right next we subtract one from that number because we want to add N9 not 10 what is 22 - 1 exactly 21 so 12 + 9 = 21 there are 21 martians on the two ships don't forget this trick next time you have to add nine first add 10 and then subtract one you may ask why am counting martians well tomorrow is my birthday and need to know how many of my friends are coming to my party it's going to be out of this world no look meteorite watch out we had 32 ships until the meteorite came and hit nine of them so how many ships do we have left let's learn how to quickly subtract nine from number we had 32 ships which means we want to subtract nine that are broken we start by subtracting 32 - 10 that leaves us with 22 ships then we add one because we want to subtract nine not 10 now we have 23 ships let's hope we can fix them soon we need them to go on vacation to Jupiter let's put these tricks into practice together here we go if we want to add nine planets to 54 how many planets are there in total first we add 10 which gives us 64 and then we subtract one this gives us 63 if we subtract nine planets from 65 how many planets are there exactly 56 because as we talked about 65 - 10 is 55 + 1 is 56 Stellar now you know how to quickly add and subtract nine from number don't forget these tricks they will save you lot of time see you soon little math Stars we've learned so much in just one video did you know there are many more videos imagine how much you could learn subscribe to the smile and learn educational channel to learn and have fun at the same time
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