Finding the Unknown Number

Learning about part-part whole relationships is essential when learning to add and subtract. When working these types of problems, the student is given a number which is the “whole”. The student is also given one other number that is one of the “parts”. The task is to find the other “part”. Students learn quickly that numbers can be split into different parts.

In the video, the teacher works through several part-part whole problems. He explains that one of the parts cannot be larger than the whole and this lets you know if you will add or subtract to find the missing part. In this worksheet, subtraction is used to find each missing part.

The worksheet provides several problems to work and the teacher explains each step he uses to solve the problem. Working part-part whole problems will improve students number sense, increase memorization of addition and subtraction facts, and that a total, or whole, can be represented by two parts.

Try Kids Academy for FREE

Gift card Enter coupon code

Note: You will not be billed until your free trial has ended and can cancel at any time. No strings attached.

Great app!
This app is wonderful for my 7 years old son! :) It focuses on basic reading, writing, and math skills. The reward system is great and consistent!
Lilbittygarza
Daughter's favorite
Still a top favorite for our 7 year old. She loves earning her stars as she learns to trace letters and numbers. Coloring and the sounds are engaging and are on target for her age group and being Pre K.
Surviving5Kids
Great app
Wow! This app is really great. For the first time my kids actually enjoy learning math and reading. The games on Kids Academy are educational and really fun.
Kimberlyxo
Great for kids
Our 7 years old daughter loves reading activities and every off-line game Kids Academy offers. This is a very good app, I highly recommend it!
TonyThan
So engaging
We love how we can focus on math with this app. It is engaging and we love how we are able to adjust and tailor the levels according to our son’s knowledge and skill levels!
Momma Anna
Such a great app!
This was a really fun way to get my kids to practice their math. I usually struggle to get them into it and Kids Academy makes it easy.
Fernanndas Stoun