How to see it
You do not need to remember all 144 facts. Learn the ones you can build. Nines: ten lots, take one lot. Seven nines is seventy take seven, 63. Twelves: ten lots plus two lots. Five, eight, six, seven: 5, 6, 7, 8, so 56 is 7 times 8. And the square numbers help you: 8 times 8 is 64.
A worked example
12 times 7. Ten sevens is 70, two sevens is 14. 70 plus 14 is 84.
The common mistake: mixing up neighbouring facts
The trap is mixing neighbouring facts. 7 times 8 is 56, but 6 times 9 is 54, and 7 times 9 is 63 while 8 times 8 is 64. If your answer is one away from a square, double check.
Try one
12 times 8.
- A86
- B96
- C88
- D104
Show the answerHide the answer
Right: B, 96
Ten eights is 80, two eights is 16.