How to Make the World Add Up: Ten Rules for Thinking Differently About Numbers

How to Make the World Add Up: Ten Rules for Thinking Differently About Numbers

Marsoni

M251S

$37.00

Get it in 3 business days with 1 day shipping. Friday, May 29

How to Make the World Add Up: Ten Rules for Thinking Differently About NumbersDescription: Condition: BRAND NEW Format: Paperback In How to Make the World Add Up, Tim Harford draws on his experience as both an economist and presenter of the BBC's radio show 'More or Less'. He takes us deep into the world of disinformation and obfuscation, bad research and misplaced motivation to find those priceless jewels of data and analysis that make communicating with numbers worthwhile. Harford's characters range from the art forger who

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EDITED TO ADD: the seller reached out after I left this review and told me the heads are replaceable! Mine didn't come with extra heads and I didn't realize they came off. Thank for reaching out! It looks like the product even comes with replacement heads now and you can also buy them separately. Perfect! These are great. _________ My kids love these toothbrushes and I love that they're rechargeable without needing batteries. However, the charging feature is almost completely negated by the fact that you can't replace the heads! It would be a 5 star if you could swap those out.

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Reviewed in the United States on April 16, 2026

Verified Purchase

Battle Creek, US

★★★★★ 5

Very cute and effective!

Color: Pink+purple, Color: Pink+purple

Very cute and effective brush! I love that there are different settings for different ages and the lowest is soft enough for my 3 year old. She LOVED choosing from the stickers to put on and there’s more left over for when she wants to change them. Stays charged for quite a long time. Would repurchase!

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Reviewed in the United States on April 30, 2026

Verified Purchase

Great camera, easy to set up. Clear picture and the spotlight is great for night time.

Los Angeles, US

★★★★★ 5

Perfect kids electric toothbrush

Color: Pink+purple

My child loves this toothbrush. I love that it’s rechargeable and comes with extra brush heads. Very suitable for kids and a great value.

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Reviewed in the United States on April 1, 2026

Verified Purchase

Dymm Witt

Draper, US

★★★★★ 4

Good quality toothbrush. However..

Color: Pink+purple

Got this for our 3-year-old granddaughter who needs to keep her teeth clean. Problem is, it tickles her teeth so is not used to the extended should be. Don't know how to solve that issue, but it is a good toothbrush.

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Reviewed in the United States on May 20, 2026

Verified Purchase

mbal09

Port Orchard, US

★★★★★ 5

Kids Toothbrush

Color: Red+blue

Purchased this toothbrush for my 5yr old! He loves it especially because it comes in his favorite colors. The prices is great as well! The charge lasts forever. I have only charged it once since I purchased. I purchased it for travel through Europe so I could throw out the toothbrush heads. The customer service is 10/10. Reached out regarding replacement brush heads because I know my son will throw a fit if they aren’t the same ones and told us they will be available for purchase and sending us some in the meantime. So now I will also be purchasing the matching water flosser!

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Reviewed in the United States on January 28, 2026