33 x 25 = 825 from the contestant. If we add the 1 on to the 25 instead of the 8x4 then we get 26 x 32 = 832. Rachel knows she needs to get to 832 but without using the 1. A neat trick you can do with multplication is double one and halve the other, so instead of 32x26, we can use 16x52 (or 8x104, 4x208 and 2x416!), could also go the other way to 64x13. Number that have a lot of options like this, such as 512 or 768, she has likely learned all of the combos for them. E.g. she will just know 32x16 = 512, the same as we know 6x4 = 24!
@@d4ve19That's how I do it because I don't have anything memorized. Just have to see that 8×104=832, then it's not so bad to go to 4×208 or 16×52 and so on
In the first numbers round, you can also do this to keep the 3 until last: 9 x 8 = 72 72 / 6 = 12 25 x 12 = 300 300 + 3 = 303 In the second numbers round, I was expecting this solution: 75 - 25 = 50 8 + 3 = 11 50 x 11 = 550 550 - 1 = 549 And another potential solution was: 5 - 1 = 4 25 x 4 = 100 100 + 75 = 175 175 + 8 = 183 183 x 3 = 549 Another solution for the third numbers round is: 25 - 1 = 24 24 x 8 x 4 = 768 9 x 7 = 63 768 + 63 = 831 And an alternative solution for the fourth numbers round is: 100 x 9 = 900 75 / 5 = 15 15 x 4 = 60 900 + 60 = 960 960 - 1 = 959
For the first one I saw it was 101 x 3 and did 25-8 = 17 17 x 6 =102 102-1 = 101 101×3 = 303 Then realised there were really easy methods after I solved it 😂
This demonstrates how incredibly Rachel knows her times tables. How she can rattle off 52x16=832 with such little effort is unbelievable
That particular one isn’t hard, 16*50 is 800 and 16*2 is 32
33 x 25 = 825 from the contestant.
If we add the 1 on to the 25 instead of the 8x4 then we get 26 x 32 = 832.
Rachel knows she needs to get to 832 but without using the 1.
A neat trick you can do with multplication is double one and halve the other, so instead of 32x26, we can use 16x52 (or 8x104, 4x208 and 2x416!), could also go the other way to 64x13.
Number that have a lot of options like this, such as 512 or 768, she has likely learned all of the combos for them. E.g. she will just know 32x16 = 512, the same as we know 6x4 = 24!
Take Away 1 from 832 and you have 831
@@d4ve19That's how I do it because I don't have anything memorized. Just have to see that 8×104=832, then it's not so bad to go to 4×208 or 16×52 and so on
For the last one I did:
100x9 is 900
75 divided by 5 is 15x4 is 60 and takeaway 1 is 59+900 959
In the first numbers round, you can also do this to keep the 3 until last:
9 x 8 = 72
72 / 6 = 12
25 x 12 = 300
300 + 3 = 303
In the second numbers round, I was expecting this solution:
75 - 25 = 50
8 + 3 = 11
50 x 11 = 550
550 - 1 = 549
And another potential solution was:
5 - 1 = 4
25 x 4 = 100
100 + 75 = 175
175 + 8 = 183
183 x 3 = 549
Another solution for the third numbers round is:
25 - 1 = 24
24 x 8 x 4 = 768
9 x 7 = 63
768 + 63 = 831
And an alternative solution for the fourth numbers round is:
100 x 9 = 900
75 / 5 = 15
15 x 4 = 60
900 + 60 = 960
960 - 1 = 959
Lol for the second round i got
75 x 8 = 600
25 x (5 - 3) = 50
550 - 1 = 549
For the 959, that was the same solution I used. 👍😎
Did anyone not named Nullifidian get the 831 in time? I didn't. Impressive Rachel solve.
For the second one I did the following:
75 x 8 = 600
5 - 3 = 2
25 x 2 = 50
600 - 50 = 550
550 - 1 = 549
(75-25) * (8+3) -1 = 549
I got 955 for the last one
75 x 8 is 600
5 - 3 is 2 x 25 is 50 subtract that from 600 for 550 - 1 549
75 × 8 =600
5-3=2
25×2=50
50+1=51
600-51=549
75-25=50
8+3=11
50x11=550
550-1=549
Everyone, now learn your 52 times table.
25x6=150
1+(9-8)=2
150x2=300
300+3=303
that's how I did it at least
Same
I did:
25+8=33
33x9=297
297+(6-1)=303
@@rubenhumbertoroquesalas2273
I think you want to avoid taking that 1 off!
@@d4ve19 You're right. 😅
I got 960 on the last one
that rear view is dangerous.
9+1-6+8 = 12
12x25 =300
300 +3 =303
For the first one I saw it was 101 x 3 and did 25-8 = 17
17 x 6 =102
102-1 = 101
101×3 = 303
Then realised there were really easy methods after I solved it 😂
75 - 25 = 50
8 + 3 = 11 times them together = 550 - 1 = 549
8 x 7 is 56 - 4 is 52
25 - 9 is 16 times them together for 832 - 1 831
549 25+1=26×3×8=624 -75=549
75x8-25x(5-3)-1
4+1+25=30
30×7=210
210×4=840
840-9=831
You used the 4 twice unfortunately my guy
@@joshuaharvey6243 WAS CONFUSED FOR A MINUTE THERE
For 303:
- 25 + 8 + 1 = 34
- 34 x 9 = 306 - 3 = 303
75-5-1=69
69×8=552
552-3=549
50x11-1, easy!
There was no 50 tho
@@Pippa11 there was no 11 either!
Lol I’m incredibly stupid 😂
noone likes a flash git
If u say 25 x 4 = 100 x 8 = 800 + 40 -9 that’s another way
Uhhhh
Thanks for everything! Here’s a little something for you: th-cam.com/video/4MspluzIpjU/w-d-xo.html