"Understanding of Reciprocals" Fraction Division PPT Courseware 4

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"Understanding of Reciprocals" Fraction Division PPT Courseware 4

Cooperation and exchange

Observing the calculations and results, what did you find?

1. The numerator and denominator have exchanged positions;

2. The products are all 1;

3. They are all multiplied by two numbers.

Two numbers whose product is 1 are reciprocals of each other.

Quick answer

Two numbers whose sum is 1 are reciprocals of each other. ( )

Two numbers whose difference is 1 are reciprocals of each other. ( )

Two numbers whose quotient is 1 are reciprocals of each other. ( )

Two numbers whose result is 1 are reciprocals of each other. ( )

Several numbers whose product is 1 are reciprocals of each other. ( )

Two numbers whose product is 1 are reciprocals of each other. ( )

1. For judgment questions, mark "√" in () if you are correct, and "χ" if you are wrong.

(1) The reciprocal of 1 is 1. ( )

(2) The two numbers whose calculation result is 1 are reciprocals of each other. ( )

(3) Because 8×1/8=1, 8 is the reciprocal. ( )

(4) The reciprocal of 0 is 0. ( )

(5) Because 2/3 is the reciprocal of 3/2, so 2/3=3/2 ( )

Please fill it in

⑴The product is ( ) and the two numbers are reciprocals of each other.

⑵The reciprocal of 4/13 is ( ) The reciprocal of 24/11 is ( )

The reciprocal of 0.7 is ( ) (some students fill in 7.0, right?)

The reciprocal of 5 is ( )

⑶The reciprocal of ( ) is itself, and ( ) has no reciprocal.

⑷23/5 and ( ) are reciprocals of each other.

⑸1/9 is the reciprocal of ( ).

⑹0.75 is the reciprocal of ( ).

⑺8×( )=1, ×( )=1,( )×0.25=1.

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Update Time: 2024-09-19

This template belongs to Mathematics courseware Jiangsu Education Edition Sixth Grade Mathematics Volume 1 industry PPT template

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