Math · Age 10 · Addition & Subtraction
Efficient Calculation Strategies (Ex. 3)
Identify the easiest calculations to perform mentally and apply compensation strategies.
Module
Addition & Subtraction
Age
Age 10
Duration
8 min
Questions
5
What's in this exercise
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Question 1
Multiple choice
Which is the easiest to calculate mentally?
Question 2
Multiple choice
370,000 + ___ = 1,000,000. What is the missing number?
Question 3
Multiple choice
500 + 499 is the same as:
Question 4
Sequence
What is the missing number in the sequence? 10 ; 100 ; 1,000 ; ___ ; 100,000
Question 5
True or false
5,000 + 4,999 is the same as 5,000 + 5,000 - 1.