Objective Multiplication Year 6 To multiply two numbers

Objective: Multiplication Year 6 To multiply two numbers by doubling one and halving the other

Think about… True or False? 12 × 4 = 24 × 2 True. Both multiplications are equal to 48. Did you notice something else?

Keywords • Product • Double • Add • Rows • Columns

Here we have a 4 rows of 5. Suppose we divide the number of rows in half and we rearrange them like this. Do we still have the same number of objects? Yes! They are just arranged differently. Now we have a 2 rows of 10. All we did was half the number of rows and double the number of objects in each row. https: //shelleygrayteaching. com/how-to-use-halving-doubling-multiplication/

What strategies could you use to solve this problem mentally? € 16 https: //www. origoeducation. com/blog/doubling-strategy-for-multiplication/

€ 16 https: //www. origoeducation. com/blog/doubling-strategy-for-multiplication/

How much is the total cost of these 3 dish soap bottles? € 2 € 2 € 6

Special offer: two bottles for the price of one € 1 The number of bottles has doubled while the price of each bottle is half the original price. € 1 € 1 € 6 € 1

2× 3=6 1× 6=6 2× 3=1× 6

Video: Further examples https: //www. youtube. com/watch? v=kbfjed. FWbi. M

Try these out… a) 42 × 50 = b) 500 × 88 = c) 12 × 2. 5 = d) 4. 5 × 2. 2 = e) 140 × 35 = http: //www. gov. pe. ca/photos/original/eecd_gr 6 math. pdf

http: //www. gov. pe. ca/photos/original/eecd_gr 6 math. pdf

… • Does doubling and halving strategy always work? • For which types of problems does doubling and halving work best?

Video: When can I use this multiplication strategy? https: //www. youtube. com/watch? v=M 0 fi. MSXUu 64

• https: //shelleygrayteaching. com/how-to-use-halving-doubling-multiplication/

Think about… True or False? 12 × 4 = 24 × 2 Did you notice that 12 is the half of 24 and 4 is the double of 2?

https: //nzmaths. co. nz/sites/default/files/Doubling. And. Halving. Sheet. pdf