top of page
Search

# Using a 100s Chart at Home

A 100s chart is a 10-by-10 grid with the numbers one to one hundred printed in the squares. I like to use 100s charts with my students to provide them with a framework to think about our base-ten number system and to explore a variety of math concepts like addition, subtraction, skip counting, and multiplication. It also provides a visual for students who are still struggling with their number sense or need visual cues when completing their math work.

Addition: When adding two numbers (e.g., 2 + 5 ) have your child start on the first number (2) and move the number of spaces of the number they are adding (touches 3, 4, 5, 6, 7). The last number they touch is their answer (7).

Subtracting: When subtracting two numbers (e.g., 25-4 ) have your child start on the first number (25) and move backward the number of spaces of the number they are subtracting (touches 24, 23, 22, 21). The last number they touch is their answer (8).

Skip Counting: When skip counting (e.g., counting by 10) have the child go start counting 1 and move that number of spaces (1,2,3,4,5,6,7,8,9,10 then11,12,13,14,15,16,17,18,19,20 ....) and color or put a box around the last number they touched (10, 20, 30, ...). Once they get to 100, they can practice saying all the numbers they marked.

Multiplication: (See image at top of page) Have your child move down and across by the numbers they are multiplying (e.g., 2 x 8- the child would move finger down to the second row and over to 8th column). The number they land on is the answer (16).

Missing Numbers: Color over random numbers and have your child fill in the missing number.

Write Numbers 1- 100: Give your child a blank 100s chart and have him fill it in.