Maths: Multiplication Magic

 Multiplication Magic

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

A factor is…. Something you can times it with to make up that certain number.

Factors of 24: 1, 6, 4, 12

Factors of 30: 6, 5, 10, 3

A Multiple is…. Counting in that number, like 2, 4, 6, 8 and so on

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

42 =16

√49 =7

25 x 8 =200

20 x 8 = 160

5 x 8 = 40


25 x 15 = 375

20 x 15 = 300

5 x 15 = 75

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?
7x5= 35
Answer: 35

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

3.Mrs Tele’a orders pencils for team 5. She orders 25 boxes of 12 pencils. How many pencils are there altogether?
25 x 12 = 300

20 x 12 = 240
5 x 12 = 60
240 + 60 = 300
Answer : 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?
14 x 12 = 168
10 x 12 = 120
4 x 12 = 48
120 + 48 = 168
Answer: 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?
27 x 12 = 324
20 x 12 = 240
7 x 12 = 84
240 + 84 = 324
Answer: 324

If they sell 45 cakes for $15 each, how much money will they make?
45 x 15 = 675
40 x 15 = 600
5 x 15 = 75
600 + 75 = 675
Answer: 675

6. Room 4 is 12m long and 11m wide. What is the area of the room?
12 x 11 = 132
10 x 11 = 110
2 x 11 = 22
110 + 22 = 132
Answer: 132

Task description: This is another one of the workshop tasks. Here all the question are based on multiplying by big number. For me I can solve these question fast but what takes up all the time is working out. What I also found was that there are two was you can solve these questions out.