## 12 And 13 Table

Contents

#### What was 13 multiplied by first?

What is the 13 Times Table?

13 × 1 = 13 | 13 × 6 = 78 |
---|---|

13 × 2 = 26 | 13 × 7 = 91 |

13 × 3 = 39 | 13 × 8 = 104 |

13 × 4 = 52 | 13 × 9 = 117 |

13 × 5 = 65 | 13 × 10 = 130 |

### Why do times tables stop at 12?

Why do multiplication tables end at 12? | Notes and Queries | guardian.co.uk Why do multiplication tables end at 12?

MULTIPLICATION tables do not end at 12, they are infinite, but we only learn them up to 12 because they are difficult, we have calculators and as there used to be 12 pence in a shilling this was the most useful number for everyday ready reckoning at the grocer’s shop. Sarah McCartney, Ealing, London W5 ([email protected])

THE TABLES don’t stop at 12 – they go on for ever. Perhaps tables aren’t taught above twelve because teachers find the 13 times table too difficult, or maybe because in pre-decimalisation days most probelms in mental arithmetic could just about be done by memorising tables up to 12. In France, for example, tables up to 20 are taught in schools. Incidentally, “decimalisation” made mental arithmetic more not less difficult in many common situations. Which is easier, working out the total cost of eight cabbages at 1s 5d each or at 17p ? Also, incidentally, there are much better ways to teach mental arithmetic than by memorising tables, e.g. starting by using the abacus. But these are not commonly used in the West. This might explain the reputed superiority of some South-East Asian countries’ elementary school maths results. Basil Smith, Kingston, near Lewes, East Sussex ([email protected])

: Why do multiplication tables end at 12? | Notes and Queries | guardian.co.uk

#### Is anything times 1 always 1?

Practice Problems – 1 -1 0 The number itself Correct answer is: 1 The multiplicative identity of a real number is 1. When we multiply 1 by any real number, we get the same number. For example, 59 ✕ 1= 59.1 27 0 -27 Correct answer is: -27 n ✕ 1 = -27 (given).

By multiplicative identity, if 1 is multiplied by a number, the product is the original number. So, since the product is -27, n is also -27. -27 ✕ 1 = -27 -101 ✕ 0 = 0 -101 ✕ 1 = – 101 -101 ✕ -1 = 101 101 ✕ -1 = – 101 Correct answer is: -101 ✕ 1 = – 101 Any number multiplied by 1 gives the same result as the number itself.

This property is illustrated in Option b. -101 ✕ 1 = – 101.

## Can you multiply to 13?

What are the Factors of 13? – The factors of 13 are the numbers that are multiplied in pairs resulting in the original number 13. In other words, the factors of 13 are the numbers that divide the number 13 without leaving the remainder. As the number 13 is a, it has only two factors, such as one and the number itself. Thus, the factors of 13 are 1 and 13.

Factors of 13: 1 and 13 Prime Factorization of 13: 1 x 13 |

### What is the table of 1?

What is the 1 Times Table?

1 × 1 = 1 | 1 |
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1 × 4 = 4 | 1 + 1 + 1 + 1 = 4 |

1 × 5 = 5 | 1 + 1 + 1 + 1 + 1 = 5 |

1 × 6 = 6 | 1 + 1 + 1 + 1 + 1 + 1 = 6 |

1 × 7 = 7 | 1 + 1 + 1 + 1 + 1 + 1 + 1 = 7 |

## What is the hardest time tables?

Which Times Tables do Students Find Difficult? There’s an excellent article on today’s Guardian Datablog looking at a computer based study (with 232 primary school students) on which times tables students find easiest and difficult. Edited highlights (Guardian quotes in italics): Which multiplication did students get wrong most often? The hardest multiplication was six times eight, which students got wrong 63% of the time (about two times out of three). This was closely followed by 8×6, then 11×12, 12×8 and 8×12. The graphic shows the questions that were answered correctly the greatest percentage of times as dark blue (eg 1×12 was answered 95% correctly). Maybe unsurprisingly, 1×1 got answered the quickest (but perhaps illustrating the hazards of speed, pupils got it wrong about 10% of the time), at 2.4 seconds on average – while it was 12×9 which made them think for longest, at an average of 7.9 seconds apiece.

- It’s quite interesting to see that this data is somewhat different to the previous graph.
- You might have expected the most difficult multiplications to also take the longest time – however it looks as though some questions, whilst not intuitive can be worked out through mental methods (eg doing 12×9 by doing 12×10 then subtracting 12.) How did boys and girls differ? On average, boys got 32% of answers wrong, and took 4.2 seconds to answer each question.

Girls, by contrast, got substantially fewer wrong, at 22%, but took 4.6 seconds on average to answer. Another interesting statistic – boys were more reckless and less considered with their answers! The element of competition (ie. having to answer against a clock) may well have encouraged this attitude. As you might expect, overall the 12 times table was found most difficult – closely followed by 8. The numbers furthest away from 5 and 10 (7,8,12) are also the most difficult. Is this down to how students are taught to calculate their tables – or because of the sequence patterns are less memorable? This would be a really excellent investigation topic for IGCSE, IB Studies or IB SL.

- It is something that would be relatively easy to collect data on in a school setting and then can provide a wealth of data to analyse.
- The full data spreadsheet is also available to download on the Guardian page,
- If you enjoyed this post you may also like: Finger Ratio Predicts Maths Ability? – a maths investigation about finger ratio and mathematical skill.

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#### Is 69 in the times table?

Answer: Yes, the three times table includes 69. The three times table yields the following results: 57, 60, 63, 66, 69, 72, 90. Answer: The answers to the 69-multiplication table are regarded as 69 multiples. The first 10 multiples of 69 are therefore 69, 138, 207, 276, 345, 414, 483, 552, 621, and 690.

#### What what is the table of 12?

The table of 12 is given by: 12 times 1 is 1, 12 times 2 is 24, 12 times 3 is 36, 12 times 4 is 48, 12 times 5 is 60, 12 times 6 is 72, 12 times 7 is 84, 12 times 8 is 96, 12 times 9 is 108 and 12 times 10 is 120.

### What times table is 12 in?

What is the 12 Times Table?

12 × 1 = 12 | 12 × 6 = 72 |
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12 × 2 = 24 | 12 × 7 = 84 |

12 × 3 = 36 | 12 × 8 = 96 |

12 × 4 = 48 | 12 × 9 = 108 |

12 × 5 = 60 | 12 × 10 = 120 |

### Is 12 in the 4 times table?

That is, in 4 times table, the pattern goes as follows, 4, 8, 12, 16, 20 and the doubled pattern in the table of 8 is, 8, 16, 24, 32, 40.