"Subtracting two-digit numbers from two-digit numbers" PPT courseware for addition and subtraction within 100

Description

"Subtracting two-digit numbers from two-digit numbers" PPT courseware for addition and subtraction within 100

Answer by name

"80-8=", "56-7=" algorithm.

10-7＝60-9＝

42－5＝ 56－7＝

Subtracting 8 from 6 in the ones position is not enough, so the tens position is reduced by 1, and the ones position becomes 16-8.

If the ones digit is not reduced enough, move back 1 from the tens digit.

Subtracting 6 from 0 in the ones digit is not enough, so borrow one from the tens digit.

The 5 on the tenth place is borrowed and 1 is left, leaving 4.

4-2=2

First determine whether to abdicate in each of the following questions, and then say what the tenth digit of the difference is.

Summary of this lesson

Be able to use the column-vertical method to calculate two-digit subtraction and two-digit subtraction, and be able to calculate the result correctly.

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For more information about the PPT courseware "Addition and subtraction within 100, two-digit subtraction by two-digit numbers", please click the Addition and subtraction within 100 ppt, two-digit subtraction by two-digit ppt tag.

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Update Time: 2024-09-09

This template belongs to Mathematics courseware Jiangsu Education Edition First Grade Mathematics Volume 2 industry PPT template

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