Multiplication Magic 2

Multiplication Magic 2

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

Times table practice:

5 x 5 = 25                                   7x7= 49

4 x 4= 16                                    8 x 8= 64

3 x 3 = 9                                     11x 11= 121

6 x 6= 36                                    5 x 4= 20

9 x 9 = 81                                   10 x 10= 100

Factors of 16 = 1, 2, 4, 8, 16

Multiples of 8 = 8, 16, 24, 32, 40, 48, 56, 64, 72, 80, 88, 96.

A prime number is a number that can only be times by 1 and itself to equal itself, for example, 11 x 1 = 11 no other times table can equal to 11 which makes 11 a prime number.

25 x 25 = 625

20 x 25 = 500

5 x 25 = 125

500+125= 625

25 x 245 = 6125

200 x 25 = 5000

40 x 25 = 1000

5 x 25 = 125

5000+1000= 6000+125= 6125

267 x 250 = 66750

200 x 267 = 53400

50 x 267 = 13350

54000+13350= 66750

    Show your working under each problem:

1.  Mrs Flavelle orders 15 boxes of cookies for camp. If each box contains 18 cookies. How many are there altogether?

15x18= 270

15x10= 150

15x8= 120

2. Mrs Tele’a orders 12 cans of beans for camp. Each tin contains 240 beans. How many individual beans has she ordered?

12x240= 2880

200x10=2000+400=2400

40x10= 400+80= 480+2400= 2880

3. Room 4 is baking a rectangular cake for the garage sale. It is 22cm long and 16cm wide. What is the area of the cake?

16x2= 32cm 

22x2= 44cm+32cm= 76cm

4. Marika has brought some lollies in to share with the class for her birthday. She has brought 14 packets which contain 32 lollies each. How many lollies are there altogether?

14x32= 448

14x2= 28

14x30= 420

28+420= 448

5. If each of the 160 students in team five paid 135 dollars for camp, how much money would the camp make from our visit?

160x135= 21600

160x100= 16000

160x30= 4800

160x5= 800

16000+4800= 20800+800= 21600