Multiplication and times tables · Usually met around P2
11 and 12 times tables
×12 is ×10 plus ×2.
How to do it
Method
×12 is ×10 plus ×2
7 × 12 = 70 + 14 = 84
Another way
Column multiplication
Ones 2 × 7 = 14, write 4, carry 1; tens 1 × 7 + 1 = 8 → 84
In full
×11 up to 9 just repeats the digit (7×11=77). For 10, 11 and 12, ×11 is ×10 plus one more lot (12×11 → 120 + 12 = 132). ×12 is ×10 plus ×2: 7×12 → 70 + 14 = 84. Thinking 'ten lots plus two lots' is easier than memorising the twelves. You can also work out ×11 and ×12 in columns.
Worked examples
Have a go first, then open each one for the answer and the working.
Example 1
11 × 3
Show the answer and working
Answer: 11 × 3 = 33
11 × 3: a single digit ×11 is the digit twice, 3 × 11 = 33
Example 2
4 × 11
Show the answer and working
Answer: 4 × 11 = 44
4 × 11: a single digit ×11 is the digit twice, 4 × 11 = 44
Example 3
11 × 11
Show the answer and working
Answer: 11 × 11 = 121
11 × 11: ×11 is ×10 and one more lot, 11 × 10 = 110, 110 + 11 = 121
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