"Using Formulas to Calculate Multiplication and Division" PPT courseware on table division

Description

"Using Formulas to Calculate Multiplication and Division" PPT courseware on table division

teaching objectives

1. Combined with specific examples, experience the process of calculating multiplication and division using multiplication formulas.

2. Know that multiplication formulas can also be used to calculate corresponding divisions, and initially learn how to use multiplication formulas to calculate quotients.

3. Be curious about using multiplication formulas to calculate division, and have a preliminary understanding of the connection between multiplication and division.

Look at the picture and tell me, how many kinds of fish are there in the fish tank? How many of each are there?

(1) How many fish are there in total?

5×3=15 (bars) or 3×5=15 (bars)

Answer: There are 15 fish of 3 types in total.

(2) If 15 fish are placed in 3 fish tanks on average, how many fish should be placed in each fish tank?

3 × ( ) = 15

15÷3＝5

Answer: Put 5 fish in each fish tank.

In conclusion

Use the multiplication formula to find the quotient; if the divisor is what number, just think of the multiplication formula of the number. The divisor multiplied by the number equals the dividend, and the quotient is the number.

Knowledge and memory

Calculating division requires quotient and multiplication tables to help.

The first two numbers of the multiplication formula are a divisor and a quotient.

The formula yields the dividend and the two are equal.

practice

1. Look at the diagrams and use formulas to calculate.

6×3=18

18÷6=3

18÷3=6

2. (1) There are () airplanes in total.

4 × 3 = 12

(2) Every 3 aircraft are organized into a group and can be organized into () group.

12÷3=4

(3) Organize into 4 groups on average, each group has () aircraft.

12÷4=3

3. Use the cards below to formulate three division equations. (Each card can only be used once)

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File Info

Update Time: 2024-10-01

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

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