Multiplying Magic

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

A factor is….

Factors of 24: 2,4,1,24,3,6,

Factors of 30:,1,3,5,6,30

A Multiple is….

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

42 = 4 x 4

√49 =7

25 x 8 =200
20 x 8=160
5 x 8 =40

25 x 15 =280
20 x 15 =205
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?
7 x 5 = 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
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 
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 =, 14 x 10 = 104, 14 x 2 = 28, 104 + 28 = (132)
5. Team 5 are working out how much money they can make from their fundraising at the garage sale.
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If they sell 27 plates of food for $12 each, how much money will they make?
27 x 12 = ?, 27 x 10 = 270 , 27 x 2 = 54, 54 + 270 = (324) 
If they sell 45 cakes for $15 each, how much money will they make?
45 x 15 = ?, 45 x 10 = 450, 45 x 5 = 225, 450 +225= 675
6. Room 4 is 12m long and 11m wide. What is the area of the room?
12x11= 132m