Cooking is a simple way to work on math skills. You can use the measuring to ask questions. Base the questions you ask on the child's competencies. Make them slightly challenging but not overwhelming. Which brings up an interesting point.
The Ratio Of Wins To Try-Agains Is Important
Depending on your child's confidence level you'll want to adjust the challenge a bit. Generally, a ratio of 80 percent wins is pretty good. It's an amount that keeps the confidence levels up but keeps them on their toes. Ratios in this area ensure that your child is working at the edge of their competency level. Constantly stretching that competency level.
Contrary to popular belief 100% wins is not constructive. Not only does this not develop skills but it also can have some serious problems. Children don't learn that mistakes are a part of learning. They may develop an identity around never being wrong. This can lead to all sorts of problem behaviors such as avoidance tactics to avoid being wrong at anything.
If a child is having serious self-esteem issues then you may want to raise the ratio of wins slightly for a short time. Just don't do it too long and when your child does make a mistake frame it as a learning opportunity. You can say "Oh you've been doing great but here's an opportunity to get even better. Let's work on this together"
Baking
If your child is doing great at the basic measurements you can start doubling, tripling, halving, or whatever the recipe. So for example, if you are baking cookies you can ask how many cookies each person should eat. Add it up and figure out how much the recipe needs adjusting. Then pose questions such as "What if we invited so and so? How many cookies would we need?"
Play around with that and you can get lots of critical thinking and math in. And then you get to eat the cookies. Not bad.
Five Little Cookies In The Bakery Shop
Shining Bright With The Sugar On Top
Along Comes Johnny With A Nickel To Pay
He Buys A Cookie And Takes It Away
Four Little Cookies In The Bakery Shop...