Language development. 4. Find Ukrainian equivalents to the following English words and word combinations:

4. Find Ukrainian equivalents to the following English words and word combinations:

to designate quantities, natural number, positive rational integer, addition, multiplication, quotient, positive fraction, difference, expeditious, negative fraction, rational number system, irrational number, introduction, totality, real number system, performing calculations, determining order, making measurements, digit, decimal point, ancient, century, transmit, translation.

5. Match the English phrases with their Ukrainian equivalents:

1. natural number a) ірраціональне число

2. positive fraction b) система чисел

3. rational integer c) крапка у десятковій дробі

4. decimal point d) додатна дріб

5. number system e) натуральне число

6. rational number f) раціональне ціле число

7. irrational number g) раціональне число

6. Complete the following sentences using the information from the text:

1. The bulk of the credit for the base-10 system …….

2. The development of geometry indicated the …….

3. Number system is any of various sets of …….

4. The natural numbers are closed with …….

5. Our modern decimal, or base-10, number system is …….

6. Because the result of dividing of two natural numbers …….

7. The introduction of the system into the West …….

7. Read the clues and complete the crossword:

^1

^2

^3

^4

^5

^6

^7

^8

Across:
	The method of combining two numbers by adding one of them to itself as many times as the other states.
	The act of adding numbers together.
	The fact of being measurable; an amount or number.
	A letter, sign or figure which expresses a sound, operation, number, chemical substance, etc.
	A total amount; sum.
	The name of the sign 0 and of the number it stands for.

Down:
	The act of measuring; a length, height, found by measuring.
	A division or part of a whole number.
	A number which is the result when one number is divided by another.
	A group of related parts which work together forming a whole; an ordered set of ideas, methods or ways of working.
	A whole number.

8. Decide whether the statements below are true or false:

1. The origins of the real number system can be traced to ancient Egyptian, Babylonian (Sumerian), and Chinese roots.

2. The natural numbers are also called the whole numbers, or positive irrational integers.

3. The natural number n is identified with the positive fraction n /1.

4. The totality of the rational and irrational numbers puts together the real number system.

5. Number is a letter or symbol used to designate quantities.

6. Similarly, the ratio of the circumference to the radius of a circle is not a rational number.

7. The positive and negative integers and fractions, and the number 0, form the rational number system.

T	T	T	T	T	T	T
F	F	F	F	F	F	F

Дата добавления: 2015-10-21