To be able to multiply a number by 10, 100 and 1000 Key idea: To be able to multiply a number by 10, 100 and 1000

x10 x10 x10 Th h t o 1 In the decimal system, the number in each column is 10 times bigger than the number to its right.

If we multiply any digit by ten it will move into the next column 6 We must put a 0 in the empty units column to hold the place so 6 x 10 = 60

Let’s look at another number x10 2 x10 3 Th h t u 2 3 Then we must remember to put the zero in to the hold the digits in place! 23 x 10 = 230

Let’s try these together! 48 x 10 = 93 x 10 = 134 x 10 = 256 x 10 = 889 x 10 = 480 930 1,340 2,560 8,890

6 Th h t o If we multiply 6 by a hundred it will move up two columns X 100 Th h t o 6 We must put a 0 in the empty columns to hold the place – 6 x 100 = 600

Write the answers on your whiteboards. Let’s try these together! 800 8 x 100 = 15 x 100 = 28 x 100= 134 x 100 = 267 x 100 = 1,500 2,800 13,400 26,700 Write the answers on your whiteboards.

If we multiply 6 by a thousand it will move up three columns x1000 Th h t u 6 We must put a 0 in the empty columns to hold the place – 6 x 1000 = 6000

Let’s try these examples! 9,000 9 x 1000 = 13 x 1000 = 64 x 1000= 149 x 1000 = 352 x 1000 = 13,000 64,000 149,000 352,000