The table of 70 is intuitively easy to learn because it simply involves multiplying by 7 and adding a zero to the final result. This approach builds on familiarity with the table of 7, extending the concept to a larger scale and leveraging the rule of multiples of ten to simplify learning. To summarize (by reversing the earlier explanation), the multiplication table of 70 is simple because it follows this method: multiply by 10 and then multiply the result by 7.

Practical tips:

• Encourage children to first multiply the number by 7 and then add a zero at the end of the result to obtain the multiples of 70. For example, 70 x 6 is calculated as (7 x 6) followed by adding a zero to make 420.
• Pattern of zeros: Notice that the results of multiplying by 70 always end in 0.
  • Example: 70, 140, 210, 280, etc.
• Seventy staircase: Imagine a staircase where each step represents a multiple of 70.
  • Example: 70 x 3 is the same as (10 x 3) + (10 x 3) + (10 x 3) + (10 x 3) + (10 x 3) + (10 x 3) + (10 x 3) = 70 + 70 + 70 = 210.
• Visual practice: Use a number table to see how the multiples of 70 align easily. Implement exercises that utilize the table of 70 in contexts such as calculating areas in tens or hundreds of square meters, where large spaces are measured.

Mnemonic rules:

• “Seven and a zero, seventy is a hero,” a simple and effective rule to help children remember how to form multiples of 70 using the table of 7 and scaling it up.
• Rhyme: “Seventy, one forty, two hundred ten, keep adding and you’ll win again.”
• Visualization: Imagine adding a zero to the number and then multiplying it by seven to see how it quickly grows.