Question 10 of 47intermediate✨ CreateShort Answer3 marks

Give 5 examples of problems where you can use the nearest multiple to find the product easily. Find the products as well.

Correct Answer

Five examples using nearest multiple:

Example 1: 6×196 \times 19 6×196 \times 19 = 6×206 \times 20 - 6 = 120 - 6 = 114

Example 2: 8×228 \times 22 8×228 \times 22 = 8×208 \times 20 + 16 = 160 + 16 = 176

Example 3: 12×912 \times 9 12×912 \times 9 = 12×1012 \times 10 - 12 = 120 - 12 = 108

Example 4: 15×3115 \times 31 15×3115 \times 31 = 15×3015 \times 30 + 15 = 450 + 15 = 465

Example 5: 7×187 \times 18 7×187 \times 18 = 7×207 \times 20 - 14 = 140 - 14 = 126

Exercise: Nearest Multiple | Q: 3 | (Page Page 7)
For More Understanding

Explanation

Students should create examples where one number is close to a multiple of 10, making it efficient to use the nearest multiple strategy.

Solution Steps

  1. Identify a number close to a multiple of 10 (e.g., 19 is close to 20).

  2. Rewrite the multiplication using the nearest multiple.

  3. Calculate the product using the nearest multiple.

  4. Adjust by adding or subtracting the difference to find the final answer.

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