Mental vs Written Methods (Ex. 1)

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1. Question 1

   Multiple choice

   Which calculation is easiest to do mentally?

2. Question 2

   Multiple choice

   For 8,457,123 − 3,218,567, which method is most appropriate?

3. Question 3

   Multiple choice

   5,000,000 − 4,999,998 is easiest solved by:

4. Question 4

   Sequence

   Each step uses mental addition. Fill: 250,000 + 250,000 = 500,000; 500,000 + 250,000 = 750,000; 750,000 + 250,000 = ___.

5. Question 5

   True or false

   For complex multi-step calculations with large numbers, a written method is usually more reliable than a mental method.

More exercises in this module

• Mental vs Written Methods (Ex. 3)

• Large Addition Across Millions (Ex. 5)

• Large Subtraction from Millions (Ex. 6)

• Mixed Operations with Millions (Ex. 7)

• Six-Digit Addition (Ex. 1)

• Adding & Subtracting Large Integers (Ex. 3)