{"id":7235,"date":"2016-06-06t17:36:15","date_gmt":"2016-06-07t00:36:15","guid":{"rendered":"\/\/www.catharsisit.com\/hs\/?p=7235"},"modified":"2016-06-06t17:37:00","modified_gmt":"2016-06-07t00:37:00","slug":"sat-mental-math-multiplying-tips","status":"publish","type":"post","link":"\/\/www.catharsisit.com\/hs\/sat\/sat-mental-math-multiplying-tips\/","title":{"rendered":"sat mental math: multiplying tips | video post"},"content":{"rendered":"

https:\/\/youtu.be\/bekr9cesowe<\/a><\/center><\/p>\n

one of the initial stumbling blocks in doing mental multiplication is you might forget that multiplying larger numbers requires breaking those larger numbers into more manageable pieces. <\/p>\n

for instance, if you see 17 x 6, you might think i can\u2019t multiply 17 times anything, except maybe one or two. but the thing is you don\u2019t want to think of 17 x 6 as multiplying 17 times anything. i know, kind of crazy, right? but here\u2019s how you do it:<\/p>\n

you break up 17 into two manageable numbers that you can both multiply times 6. then, add the result of those two numbers to get the answer. sure, you could 9 and 8, meaning (9 x 6) + (9 x 8), but the easiest way is to choose a number ending in a zero<\/strong>, since those numbers are easiest to multiply. <\/p>\n

for example, 17 can be broken into 10 and 7. (remember: 7 + 10 = 17). multiplying the 6 by 10 should be pretty instantaneous: it equals 60. that leaves the 7, giving us 7 x 6 = 42. adding those two gives us 42 + 60 = 102. <\/p>\n

an important point is not to think of this as a writing exercise, in which you write 10 x 7 and 6 x 7. multiplying these out the traditional way\u2014pencil and paper\u2014would work best. but when doing numbers in your head, breaking them up this way makes things a lot easier. what you are doing is multiplying the 10 x 6, then keeping that 60 \u201con hold\u201d, while you multiply 6 x 7. then you add that 60 to the 42. <\/p>\n

what happens when you have a slightly larger number?<\/strong> say 32 x 8? <\/p>\n

one way would be to multiply 10 x 8 three times. but a faster way is to multiply 30 x 8, since 30 is a number ending in zero that is closest to 32. this gives us 30 x 8, which is the same as 3 x 8 with a zero at the end: 24, adding a zero at the end, gives us 240. we put this number \u201con hold\u201d and then we multiply the 2 left over (remember, our original number was 32) times the 8: 2 x 8 = 16. we add this to the number \u201con hold\u201d\u2014240\u2014giving us 240 + 16 = 256. <\/p>\n

check out the video for more sat mental math practice!
\n<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

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href=\"https:\/\/www.mba.com\/exams-and-exam-prep\/gmat-exam\/why-take-the-gmat-in-2021-when-many-schools-are-test-optional\" rel=\"noopener noreferrer\"> gmac<\/a>, and<a href=\"https:\/\/www.businessbecause.com\/news\/gmat\/3263\/mba-admissions-gre-challenges-gmat\" rel=\"noopener noreferrer\"> business because<\/a>.\r\n\r\n\r\nin his time at magoosh, chris has taught countless students how to tackle the<a href=\"https:\/\/www.amazon.com\/gre-prep-magoosh\/dp\/1939418917\/\" rel=\"noopener noreferrer\"> gre<\/a>, gmat, sat, act, mcat (cars), and lsat exams with confidence. some of his students have even gone on to get near-perfect scores. you can find chris on <a href=\"https:\/\/www.youtube.com\/channel\/ucz4sgyj6l0cgnvnihy8gy6w\">youtube<\/a>,<a href=\"https:\/\/www.linkedin.com\/in\/chris-lele-095005a0\"> linkedin<\/a>, <a href=\"https:\/\/twitter.com\/chrismagoosh\">twitter<\/a> and <a href=\"https:\/\/www.facebook.com\/chrislelemagoosh1\/\">facebook<\/a>!"}],"_links":{"self":[{"href":"\/\/www.catharsisit.com\/hs\/wp-json\/wp\/v2\/posts\/7235"}],"collection":[{"href":"\/\/www.catharsisit.com\/hs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"\/\/www.catharsisit.com\/hs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"\/\/www.catharsisit.com\/hs\/wp-json\/wp\/v2\/users\/10"}],"replies":[{"embeddable":true,"href":"\/\/www.catharsisit.com\/hs\/wp-json\/wp\/v2\/comments?post=7235"}],"version-history":[{"count":0,"href":"\/\/www.catharsisit.com\/hs\/wp-json\/wp\/v2\/posts\/7235\/revisions"}],"wp:attachment":[{"href":"\/\/www.catharsisit.com\/hs\/wp-json\/wp\/v2\/media?parent=7235"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"\/\/www.catharsisit.com\/hs\/wp-json\/wp\/v2\/categories?post=7235"},{"taxonomy":"post_tag","embeddable":true,"href":"\/\/www.catharsisit.com\/hs\/wp-json\/wp\/v2\/tags?post=7235"},{"taxonomy":"author","embeddable":true,"href":"\/\/www.catharsisit.com\/hs\/wp-json\/wp\/v2\/ppma_author?post=7235"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}