~Multiplication Magic 1~

  Multiplication Magic

We are learning to use place value to solve multiplication problems using whole numbers.

A factor is…. Things that you can multiply to make that number.

Factors of 24: 6,1,24,3,12

Factors of 30: 5,1,10,30,15,

A Multiple is…. Times x

Multiples of 6:  12,18,24,30,36,42,48,54,60

42 = 4 x 4 = 16

√49 = 7 x 7 = 49, answer 7

25 x 8 = 200

20 x 8 = 160

5 x 8 = 40

25 x 15 = 385

20 x 15 = 300

5 x 15 = 85

  

  Show your working under each problem:

1.  Mrs Ilaoa orders 5 boxes of bats. If each box contains 7 bats, how many bats are there altogether? 5 x 7 = 35, answer there are 35 bats altogether.

2. She then orders 23 boxes of cones. If each box contains 8 cones, how many cones are there altogether? 8 x 20 = 160, 8 x 3 = 24, 184 is the amount of cones.

3.Mrs Tele’a orders pencils for team 5. She orders 25 boxes of 12 pencils. How many pencils are there altogether? 20 x 10 = 200, 10 x 5 = 50, 2 x 20 = 40, 2 x 5 = 10, altogether 300.

4. Chance has brought some lollies in to share with the class for her birthday. She has brought 14 packets which contain 12 lollies each. How many lollies are there altogether? 10 x 10 = 100, 10 x 4 = 40, 2 x 10 = 20, 2 x 4 = 8, altogether = 168

5. Team 5 are working out how much money they can make from their fundraising at the garage sale. 

If they sell 27 plates of food for $12 each, how much money will they make? 10 x 20 = 200, 10 x 7 = 70, 2 x 20 = 40, 2 x 7 = 14, altogether 324

If they sell 45 cakes for $15 each, how much money will they make? 10 x 40 = 400, 10 x 5 = 50, 5 x 40 = 200, 5 x 5 = 25, altogether 675

6. Room 4 is 12m long and 11m wide. What is the area of the room? (Area: Length x Width) 10 x 10 = 100, 2 x 1 = 2, altogether 102m is the area of room 4