"The relationship between addition and subtraction" PPT courseware on the relationship between addition and subtraction and the law of addition

Description

"The relationship between addition and subtraction" PPT courseware on the relationship between addition and subtraction and the law of addition

fill in the blank:

( )+20=50 120+ ( )=150

( )+40=100 150+ ( )=200

( )+35=60

learning target

1. Combined with specific problem situations, guide students to understand and master the relationship between addition and subtraction, deepen their understanding of addition and subtraction, and be able to solve practical problems

2. Develop preliminary judgment and reasoning abilities.

Self-study guidance

1. Look at the situation diagram on page 43 of the textbook. What information did you get from this? And list the calculations.

2. Discuss in groups. After 3 minutes, see which group has discovered the most information?

addend + addend = sum

One addend = sum – another addend

Minuend – Minuend = difference

Minuend = Difference + Minuend

Difference = Minuend – Minuend

fill in the blank

①An addend = ( )—( )

②Rewrite it into two subtraction formulas based on 600+1100=1700: ( ), ( )

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For more information about the PPT courseware "The relationship between addition and subtraction and the law of addition and subtraction", please click the "The relationship between addition and subtraction and the law of addition ppt. The relationship between addition and subtraction ppt" tag.

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"Law of Addition" PPT courseware on the relationship between addition and subtraction and the law of addition:

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Update Time: 2024-10-20

This template belongs to Mathematics courseware Western Normal University Edition Fourth Grade Mathematics Volume 1 industry PPT template

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