95 • 21
(100 - 5)(20 + 1)
2000 - 100 + 100 - 5
1995
^^ Decompose & Distribute (aka FOIL)
or
95 • 21
95 • 2 = 190 so 95 • 20 = 1900
Add on 1 more 95 = 1995
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Look at all the clever strategies for one tiny problem! Way to math, people!

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Halfway between 1/8 and 1/4 is not 1/6... but I know 1/4 = 2/8
So halfway between 1/8 and 2/8 is
1.5/8
Multiply top & bottom each by 2
--> 3/16
#iTeachMath
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51 x 16
(50 + 1)(10 + 6)
500 + 6•50 + 10 + 6
500 + 300 + 16
816
^^Decompose & Distribute
or
51 x 16
102 x 8
(100 + 2)•8
800 + 16
816
^^Double & Halve
or
51 x 16
3 x 17 x 16
I know 16•16 = 256, so 17•16 = 256 + 16 = 272
3 x 272
3•(200 + 70 + 2)
600 + 210 + 6
816
^^Use known math fact
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Nice proportional reasoning with percents Erica! Percents are Figureoutable!

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A3: Pam's #MathStratChat each Wednesday has taught me so many strategies I can share w/Ss.
Love!
Also @howiehua.bsky.social poses a Mental Math Monday prompt each week.
#ElemMathChat

14•75
7•150
7(100 + 50)
700 + 350
1050
[double & halve, then decompose & distribute]
OR
14•75
14•(3/4)•100
14 • 3 • (1/4) • 100
42 • (1/4) • 100
(40+2)/4 • 100
(10 + 1/2) • 100
1000 + 50 --> 1050
#FractionsAreYourFriends
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Nice proportional reasoning Shawn! Cross multiply and divide would miss all of that lovely thinking. Well done!

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Love this one! Hi @pwharris.bsky.social !!
16% of 50
Same as 16/100 • 50/1
= 16/1 • 50/100
= 1/2 • 16
= 8
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#FractionsAreYourFriends

Listen to Kim's and my strategies for this week's problem!
Check our new #MathStratChat episode in the Math is FigureOutAble podcast!

podcast.mathisfigureoutable.com/1062400/epis...

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Lovely proportional reasoning Kathleen! Scaling up and down in tandem, combining pieces that make sense and staying in context. Super!

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If 8x = 20 and we want 20x,
There are 2 and a half 8's in 20.
So multiply both sides by 2 1/2
Double then add on half of original
8x + 8x + 4x = 20 + 20 + 10
20x = 50

I'd show it with arrows
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Well done Jennifer Jacobs! Nice proportional reasoning!

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37 + 38
35 + 2 + 35 + 3
70 + 5 = 75
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4 lbs = $7
2 lbs = $3.50
20 lbs = $35
2 + 20 lbs = $3.50 + $35
22 lbs = $38.50
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