X2x2 + x x 2 +3x +2 +2x x + 2 x 2 + x +2x +2 Learning how to do long multiplication with number and algebra.

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Presentation transcript:

x2x2 + x x 2 +3x +2 +2x x + 2 x 2 + x +2x +2 Learning how to do long multiplication with number and algebra

What is … 18 x 36 ? Imagine the sum as (10+8)(30+6) on the other Remember! MULTIPLY to get the answers inside the boxes on one side =

What is … 82 x 41 ? Imagine the sum as (80+2)(40+1) on the other Remember! MULTIPLY to get the answers inside the boxes on one side =

x +1 x +2 x2x2 + x = x 2 +3 x x +2 Algebra … (x+2)(x+1) ? x + 2 on one side x + 1 on the other x 2 + x +2 x +2 Don’t write +1 x !

3x +7 4x +2 12x x = 12 x x x +14 Algebra … (4x+2)(3x+7) ? 4x + 2 on one side 3x + 7 on the other 12x x + 6 x x x 3x means 4 x 3 x x x x

3x +5 2x +4 6x x = 6 x x x +20 Algebra … (2x+4)(3x+5) ? 2x + 4 on one side 3x + 5 on the other 6x x + 12 x x x 3x means 2 x 3 x x x x