# Tag: 4.OA

## Will the Barbie movie out-perform Avatar at the box office?

Do you think that Barbie can out-earn Avatar?  Students study the numbers, recognize the need for an inflation adjustment, get to share their observations about the movie and its messages, and draw their own conclusions about how far Barbie will go as a money-maker.

## Will I have enough stuff?

We have 2 activities for National S’mores Day. (1) Number of ingredients to buy with no waste for all of my guests! (2) Building the largest S’more ever. What is reasonable.? How many marshmallows are in this recipe? How many people could this cookie feed? How many marshmallows could you eat?

## Women’s World Cup – How many matches are left?

The first round of Group play has finished and now the remaining teams start the second round of play. The teams have already played a lot of matches.  How many? And, how many matches are left?

## Spring and Easter ideas – 6 activities

Dyeing eggs with food coloring – Students use the chart on the back of a food dye package to compare the strangely different recipes listed for coloring a cake, icing, or dyeing eggs. They look for and create equivalent ratios…

## Challenges for April Fools Day

This day is known for pranks and puzzles.   Try one of these 4 activities on April Fools Day. Ask students to analyze where I made my mistake        PerplexingProblem.pdf For members we have solutions. PerplexingProblem-solution.pdf      …

## Is 2023 a special number?

What do you notice about 2023?
Does 2023 meet the criteria?
Big deal?  Rare?  Often?

## The Algebra of Magic Squares

Students examine Magic Squares for how they could help with math computation practice and having fun.

Jennifer Fairbanks from Hopkinton, MA sent us this picture of the cookies that she baked in 4 hours using 13 eggs and 5 cups of sugar. Do you see some math here?

## What time should I wake up?

Surprise Mother’s Day breakfast in bed! I think she would like orange juice, scrambled eggs, biscuits, and hot coffee. I’ll add some flowers from outside and fruit to make it look fancy. Of course I want the hot food to all be hot when I serve her. When should I wake up in the morning to do all of this?

## April Fool’s Day fun

Try one of these 4 activities on April Fools Day. Where did that extra dollar go? Mystical Mathematical Mind Reader; perplexing missing square in the triangle; and Robert Kaplinsky’s foil prank.

## February 22, 2022

Why do you suppose we are posting this date as a topic for YummyMath? What do you think is so special about this date? Does this happen often?  When might a similar day occur?

What is interesting about the number, 12 22 21 … and why did we put it on YummyMath today?

## Tree for Springtime

Here in the Northeast, flowers are blooming and trees are leafing out. We thought the creation of a tree that grows before your eyes might be akin to what is going on all around us. What do you see that…

## Will our U.S. flag change yet again?

How many stripes are in our present flag pictured above?  (The bottom right flag that has been in use since 1960.) How many stars? What do the numbers of stars and stripes represent? U.S. Congress is again considering whether to…

## Inauguration Date

The date of the Presidential Inauguration this year can be written in an interesting way. What do you notice?  What do you wonder?  Do you think that this happens often in a year?