Numbers and Operations ＊ Byrdseed.TV

Broken Calculator: Multiplication Cross Product

This calculator multiplies almost correctly. Students will find the one step it skips.

Broken Calculator: 2-Digit Addition

This calculator adds two-digit numbers wrong, the same way every time. Crack the rule, then predict its next mistake.

Broken Calculator: 2-Digit Subtraction

This calculator gets subtraction wrong the same way every time. Can your students crack its broken rule?

A Decimal Rounding Surprise

Decimals are the same distance apart. But one pair rounds together and the other splits. Why?

How Many Ways: Add Fractions to a Decimal

Three fractions must add to exactly 1.07.

$Numerator or Denominator: Which has more power in a fraction?$

Numerator or Denominator: Which has more power in a fraction?

What do you do with students who already get their fraction operations? Give them a contrived project about recipes or pizza slices? Make them solve annoyingly hard practice problems? Please. Here, we get students thinking in a whole new way, pondering which has more power, the numerator or denominator.

Fraction Ordering Tournament

Which set of fractions would be the trickiest to order from least to greatest? Let’s have a tournament!

How Many Ways: Fractions Divide Equals 2/3

One equation. Digits one through nine. How many ways can you make it work?

How Many Ways: Fraction Equivalence

How many different ways can you make this math statement true using only the digits one through nine?

Game: Number Scrabble

What if we played Tic-Tac-Toe with numbers and instead of three-in-a-row, we add up to 15? Well… then we’d have Number Scrabble!

$Back to School Math Worksheets$

Back to School Math Worksheets

In these math problems, the solution is already given. But another number is missing!

How Many Ways: A Remainder of 5

Fill in the blanks so the division leaves a remainder of exactly 5.

How Many Ways: Divide to 5 (Decimals)

Fill in the blanks so a division comes out to exactly 5.

Furnishing A Hotel

Design and furnish hotel rooms on a budget. Real math, real constraints, real decisions. Then pitch your hotel to investors.

Fractions: Decompose and Recompose

What if we took a fraction apart, then took those pieces apart, then recombined them, and then recombined those, arriving back to the original fraction?

How Many Ways: Order of Operations 1

How many different ways can you make this math statement true using only the digits one through nine?

How Many Ways: Add to 170

Four blanks, ten digits, one target. Students hunt for every pair of two-digit numbers that adds to 170 without repeating a digit, then work out why there are only four.

How Many Ways: Fraction Subtraction Equals 1/2

How many different ways can you make this math statement true using only the digits zero through nine?

Multiply to Find the Smallest Fraction

One equation, digits one through nine, and a hunt for the smallest possible answer.

What If There Were No Hundreds Place?

Imagine a world with no hundreds place. We’d have to call it ten tens instead. But then, what would we call the thousands place? How would we read 9999? What if we added one more?

What’s the Pattern? Fraction Addition

Can your students figure out how to add fractions by looking for a pattern?

Disneyland Parking Structure Math Project

Your students will use estimation strategies to figure out how many parking spots are there in the parking structure at Disneyland? And you bet I reveal the real answer!

How Many Ways: 2 Digits ÷ 1 Digit = 1 Digit

How many different ways can you make this math statement true using only the digits one through nine?

How Many Ways: Fraction Subtraction 234

How many different ways can you make this fraction subtraction statement true using only the digits one through nine?

$Spring Math Worksheets: Addition and Subtraction$

Spring Math Worksheets: Addition and Subtraction

Four sets of 2-digit and 3-digit addition and subtraction practice. But the unknown isn’t where you expect it to be!

Calculators, Patterns, and Multiplying By Decimals

Before teaching students the procedure for multiplying with decimals, how much can they intuitively glean from a structured play session with calculators?

How Many Ways: Two Hundredths Apart

Build a fraction and a decimal that land exactly two hundredths apart.

How Many Ways: Add to 50

Fill in the blanks so two numbers add to exactly 50, using each digit only once. Then find the sneaky ways that start with a zero.

Place Value (Beyond Base 10)

Place value is something we cover in elementary school. It seems simple, but I’d wager that very few adults really understand the topic. I sure didn’t until I worked with non-base-10 number systems in college. Your students can get a taste of this mind-boggling experience by imagining what it would be like if we didn’t have the number 9. What would each digit represent then?

How Many Ways: Divide Fractions Equal 1/4

How many different ways can you make this fraction division math statement true using only the digits one through nine?

Fizz Buzz: A Counting and Divisibility Game

Ready for a tricky counting and divisibility game?

How Many Ways: Subtract to 7.5

Fill in the blanks so two decimals land exactly 7.5 apart.

Polar Weather Report

The North Pole hits -40°. The South Pole hits -60°. Calculate the averages, graph the data, and deliver your polar weather report.

$Spring Math Worksheets: Multiplication and Division$

Spring Math Worksheets: Multiplication and Division

Sets of multiplication and division practice problems. But the unknown isn’t where you expect it to be!

How Many Ways: Add to 5

Fill in the blanks so two decimals add to exactly 5, using each digit only once.

Fizz Buzz: Counting by 2s and 3s

A counting game where twos become “fizz” and threes become “buzz.” Easy to learn, surprisingly hard to survive.

The Game of 100

Who can get to 100 first in this simple, but delightful, math game?

Subtraction: 3 Digits Minus 2 Digits (Multiple Solutions)

Typical practice problems don’t move students up Bloom’s Taxonomy. With this framework, you’ll see kids stop and really think about how to approach multi-digit subtraction.

Find The Pattern: Multiply Fractions

What if you set the stage for students to discover how to multiply fractions?

Addition: 3 Digits Plus 2 Digits (Multiple Solutions)

Typical practice problems don’t move students up Bloom’s Taxonomy. With this framework, you’ll see kids stop and really think about how to approach multi-digit addition.

How Many Ways: Fraction Addition 234

How many different ways can you make this fraction addition statement true using only the digits one through nine?

How Many Ways: Fractions Multiply 2/3

How many different ways can you make this fraction multiplication statement true using only the digits one through nine?