1. Explain it simply
After a 比 comparison, add a degree phrase to say how much: adjective + 一点儿 / 多了 / 得多.
一点儿 means a little; 多了 and 得多 mean much more.
The degree phrase always comes AFTER the adjective: 高一点儿, 贵多了.
Keep the frame A 比 B + adjective + degree, and never add 很 or 太.
2. Show examples
他比我高一点儿。
Tā bǐ wǒ gāo yīdiǎnr.
Sandhi:Tā bǐ wǒ gāo yìdiǎnr.
He is a little taller than me.
一点儿 = a small difference
这个比那个贵多了。
Zhège bǐ nàge guì duō le.
This one is much more expensive than that one.
多了 = a big difference
今天比昨天热得多。
Jīntiān bǐ zuótiān rè de duō.
Today is much hotter than yesterday.
得多 comes after the adjective
3. Share a tip
Put the degree word after the adjective - say 高一点儿, not 一点儿高.

