Comments on: Multiplication?

By: klondike b

klondike b — Mon, 19 Oct 2009 06:09:59 +0000

a. 315
b. 315
c. 224
d. ??
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By: Kyle B

Kyle B — Mon, 19 Oct 2009 06:02:59 +0000

a. 45x+63x
b. 35+7=?
c. 14×16
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By: kumiko2420

kumiko2420 — Mon, 19 Oct 2009 05:23:59 +0000

a) 108
b) 44
c) 224
d) 26
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By: tiggs1515

tiggs1515 — Mon, 19 Oct 2009 05:13:59 +0000

switch the multiplication terms inside the () because the other term is not multiplied.

b) 9+(7×5)
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By: aragornzxl

aragornzxl — Mon, 19 Oct 2009 04:48:59 +0000

its B) 9+(7×5)
you’d see that your questions adds up to 44 (since 5*7 is 35, plus a 9 is 44)
Answer B is also 44, because nothing changed except for the order of the 7 and 5, which you know that it doesnt make a difference whether you do 7×5 or 5×7.
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By: Mastermind

Mastermind — Mon, 19 Oct 2009 04:35:59 +0000

b) 9+(7x5)
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By: briley_can

briley_can — Mon, 19 Oct 2009 04:02:59 +0000

b
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By: brtny_hrmn

brtny_hrmn — Mon, 19 Oct 2009 03:33:59 +0000

b.
the way my teacher made me remember which way commutative prop of multiplication was that think of ‘commuting’ and that if you can ‘travel on way on a multiplication problem (5×7) then you ‘commute’ back the other way just the same (7×5). The 9 is just there to throw you off haha
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