Grade 4 - Progress in Mathematics

Logic

You have to read carefully to be sure you do not

draw a false conclusion from true statements.

Read these statements and conclusions.

All the statements are true.

statements: All dogs have ears.

Sparky is a dog.

conclusion:Sparky has ears. TRUE

statements: All dogs have ears.

My cat has ears.

conclusion:My cat is a dog. FALSE

Read the true statements carefully. Then write

trueor false for each conclusion.

0 1. All ducks have feathers. 0 2. All fish can swim.

1. A chicken has feathers. 01. A salmon is a fish.


2. A chicken is a duck. 01. A salmon can swim.

0 3. Ralph is a 4th-grade boy. 0 4. All the 4th-grade boys wore

1. All the 4th-grade boys 01. sneakers on Monday.


2. wore sneakers on Monday. 01. Maria wore sneakers


3. Ralph wore sneakers 01. on Monday.


4. on Monday. 01. Maria is a 4th-grade boy.

0 5. All triangles are polygons. 0 6. All squares are parallelograms.

1. A pentagon is a polygon. 01. All rectangles are parallelograms.


2. A pentagon is a triangle. 01. All rectangles are squares.

0 7. Triangle Ahas one right

angle. All triangles with

one right angle are right

triangles.

Triangle Ais a right triangle.

A

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