Today is Friday,June.4th,2021.

Operations with numbers: Subtraction:

What is twenty-two minus seven?

Line up the digits

First, look at the ones place.

Two is less than seven, so we regroup ones from tens place.

Look at the tens place, We can write two tens as one ten plus one ten

Then regroup one ten as ten ones into the ones place to get twelve ones.

Twelve is greater than seven. So twelve minus seven is five.

Look at the tens place, one minus zero is one.

So the number is fifteen.

Vocabulary

addition, subtraction, regroup, difference

Key Sentences

What’s the difference between twenty and nine?

The difference between twenty and nine is eleven.

教学目标：

1. 孩子能将减法的思维过程用语言解释出来。

2. 通过借位（regroup） 用一个两位数减去一个一位数；通过借位用一个两位数减去两位数。

Homework:

1.反馈单

2.读语音链接，用英文思维说出减法的过程