Mental calculation technique
Mental calculation technique
Example
Mental calculation
Reason
398*4
1600-8=1592
398*4=(400-2)*4
.. read more.
Quick Table of Multiples
Quick Table of Multiples
[Multiple of 2]
If the last figure of a number is even, then the number is a multiple of 2.
[Multiple of 3]
If the sum of every figure is a .. read more.
division
Question: Sam put 18 pencils in 3 equal groups. How many pencils are in each group?
Strategy:
1) UNDERSTAND:
What do you need to know?
You need to know that there are 18 pencils and they .. read more.
How to Solve
Question: Amy and Judy sold 12 show tickets altogether. Amy sold 2 more tickets than Judy. How many tickets did each girl sell?
Strategy:
1) UNDERSTAND:
What do you need to find?
You need to know .. read more.
