"Mixed Operations of Addition and Subtraction" PPT courseware

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"Mixed Operations of Addition and Subtraction" PPT courseware

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"Mixed Operations of Addition and Subtraction" PPT courseware

teaching objectives

1. Combined with specific situations, experience the process of independently exploring calculation methods of mixed calculations of addition and subtraction.

2. Master the order of mixed operations of addition and subtraction, and be able to correctly calculate mixed operations of addition and subtraction within 100.

3. In the process of solving simple problems, realize the close connection between mathematics and life.

I calculate it like this:

18+23=41 (pieces)

41-22=19 (pieces)

18+23-22

=41-22

=19 (pieces)

Answer: There are 19 balls left.

Mixed operations of addition and subtraction must be calculated from left to right.

give it a try

1. Do the math.

38+47-65 85-46+22

53-40+27 62+34-82

2. Fill in the blanks.

10+45-25= ( )

33-15+25= ( )

50+26+11= ( )

66-24+25= ( )

81+19-81= ( )

24-19+30= ( )

practice

1. There are 38 passengers on the bus. How many passengers are there now?

Nine passengers got off the bus and 12 got on.

2. How many pine cones are there now?

3. The school has 65 boxes of white chalk and 27 boxes of colored chalk. 73 boxes have been used. How many boxes are left?

4. There were originally 53 cars in the parking lot. 26 cars left and 19 more cars came in. How many cars are there now?

5. There are 75 books in the small book corner of Class 2 (1). 40 books were borrowed on Friday and 26 books were returned. How many books are there in the library corner now?

6. Do the math.

73-39+46 43+27-50

42+50-66 96-80+35

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For more information about the "Addition and Subtraction Mixed Operations" PPT courseware, please click the Addition and Subtraction Mixed Operations ppt tag.

"Mixed Operations of Addition and Subtraction of Rational Numbers" PPT courseware:

"Mixed Operations of Addition and Subtraction of Rational Numbers" PPT courseware review review (1) What is the addition rule of rational numbers? The addition rules of rational numbers: (1) When adding two numbers with the same sign, take the same sign and add the absolute values; (2) When adding two numbers with different signs with unequal absolute values, take the absolute value comparison..

"Addition and Subtraction Mixed Operations" Flash animation courseware 3:

"Mixed Operations of Addition and Subtraction" Flash Animation Courseware 3 This courseware is a teaching material of the Mixed Operations of Addition and Subtraction in the first unit of the second-grade mathematics volume of the Hebei Education Edition. The content is vivid and vivid. Please download it! Keywords: Addition and subtraction mixed operations teaching courseware..

"Addition and Subtraction Mixed Operations" Flash animation courseware 2:

"Addition and Subtraction Mixed Operations" Flash Animation Courseware 2 This courseware is a teaching material for the Little Squirrel Fast Food Restaurant Flash animation courseware for the first unit of the second-grade mathematics volume of the Hebei Education Edition. Please download it! Keywords: Addition and subtraction mixed operations teaching course..

File Info

Update Time: 2024-11-13

This template belongs to Mathematics courseware Hebei Education Edition Second Grade Mathematics Volume 1 industry PPT template

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"Mixed Operations of Addition and Subtraction" PPT courseware
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