expanded is longer standerd is just regular partial products to find like standerd means simple your level. expanded means longer to stretch, or 2 make big.
YES (i think)
I'm not entirely sure I know what you mean by "expanded algorithm" but here is a guess: 31 * 19 = (13 * 9)+(31 * 10) = 117 + 310 = 427
to check your answer to check if ti is right .
The prime factors of 136 are 2x2x2x17 (or 23x17).
They are different because standard algorithm is more common then the expanded algorithm
Yes
The expanded algorithm makes use of the partial products to fully explain place value in multiplication. The standard algorithm which is most commonly used is considered superior and less confusing.
expanded is longer standerd is just regular partial products to find like standerd means simple your level. expanded means longer to stretch, or 2 make big.
1363
YES (i think)
I'm not entirely sure I know what you mean by "expanded algorithm" but here is a guess: 31 * 19 = (13 * 9)+(31 * 10) = 117 + 310 = 427
to check your answer to check if ti is right .
The prime factors of 136 are 2x2x2x17 (or 23x17).
92/2 = 46 46*10 = 460.
10
If it is 23 feet by 17 feet then 23x17 =391 sq.feet