Applying Number Facts

1
Applying Number Facts

• Work out the following

78 x 23
Hint Try the grid method
70 8
1400
20
210
1400 160
160
3
210 24
24
1794
2
Applying Number Facts

• We now know a fact and can use it to solve
  several other questions

78 x 23 1794
78 work backwards

• 1794 23
• 780 x 23
• 78 x 2.3
• 78 x 46
• 79 x 23
• 7.8 x 2.3
• 39 x 23
• 1794 4.6

17940 multiply by 10
179.4 divide by 10
3588 double
1817 add another 23
17.94 divide by 100
897 half
390 work backwards, half, x 10