"The Hard-working Little Bee" PPT Courseware 9

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"The Hard-working Little Bee" PPT Courseware 9

1. Situation introduction

There are 435 eggplants

276 eggplants inspected

How many eggplants are there that have not been checked?

189 cabbages inspected

276 eggplants inspected

How many more eggplants have been inspected than cabbages?

2. You ask me

How many eggplants are there that have not been checked?

435-276=159 (tree)

Subtracting 5 from 6 in the ones place is not enough, so move back 1 from the tens place. 15 minus 6 equals 9.

Subtracting 7 from 2 from the tens place is not enough, so go back 1 from the hundreds place. 12 minus 7 equals 5.

3 minus 2 equals 1 in the hundreds place.

Think about it, what should you pay attention to when calculating subtraction?

1. Align the same digits.

2. Subtract from the single digit.

3. If the number on any digit is not enough to subtract, then subtract 1 from the previous digit, add 10 to this digit, and then subtract.

3. Independent practice

1. Vertical calculation.

2. Solve the problem

3. Find the pattern and fill it in.

4. (1) How much cheaper is a phone than a mobile phone?

586-289=297 (yuan)

(2) How much does it cost to buy a mobile phone and a camera?

586+318=904 (yuan)

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Update Time: 2024-10-21

This template belongs to Mathematics courseware Qingdao Edition Second Grade Mathematics Volume 2 industry PPT template

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