@howie_hua: How would you mentally calculate 16×15? #math #mathematics #mathtok #maths #teachersoftiktok #teacher #mentalmathmonday

Howie Hua
Howie Hua
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Monday 16 May 2022 17:12:03 GMT
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seth_foster93
Seth Foster56 :
15 × 15 + 15. because once in school we had to memorize the squares up to 25 and I remember 1 - 15, 20, and 25
2022-05-16 17:45:49
21
seanlikesssbolts
Sean :
16×15=8×30=240 sincerely a math major
2022-05-16 18:41:54
11
jurriaan.de.greeuw
Jurriaan de Greeuw :
160 add half a 160
2022-05-16 17:24:19
29
sirboabert
SirBoaberr :
I know 15 squared and then add 15 to that.
2022-05-17 22:40:15
2
peterkingo2
Peter King :
Split the 16. Then 150 + 60 + 30 = 240.
2022-05-16 19:53:32
5
topbonkers
topbonkers :
my method is probably a bit strange, but I divided 15 by 3, and multiplied 16 by 3 to get 5 × 48, then split it into 5(40) + 5(8) = 240
2022-05-16 17:49:41
6
kevers12
Kev :
15x2 = 30, 3x8 = 24 and you add 0 at end
2022-05-16 18:30:18
3
emyk082021
emyk082021 :
(10x15) + (3x30)
2022-05-16 19:45:15
2
sirpetethegreat0
Pete :
15^2=225 225+15=240 Had to memorize squares for n up to 25 in high school geometry
2022-05-16 19:26:51
2
j_braithwaite
Justin Braithwaite :
Love these videos
2022-05-16 18:49:48
2
randomdays906
RandomDays :
225 + 15
2022-05-16 18:01:27
2
askarikari_312
The Grinch’s wife :
16 x 15 = 4 x 3 x 4 x 5 = 12 x 20 = 240
2022-05-16 18:31:12
1
sachinnair56
Sachin Nair :
15x15 + 15
2022-05-22 22:33:31
0
krysdaro
Dan 🫶 :
16+5=21, 210 + 6 x 5 =240
2022-05-19 18:48:09
1
svwhitex2
shanavwhite777 :
16x10=160x5=800
2022-05-16 18:06:00
1
kingboogiemke
cwr :
Ether way that it, can be written honestly, how did you even come up, with this equation here!!!!!!
2022-05-16 21:24:24
1
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