III. Reading, writing and saying numerical expressions

1. Read the following numerical expression to your partner. S/he will fill in the blank with the missing operation symbol and says the operation which the given numbers are subjected to. The first example is done for you.

Expression		Operation
ten multiplied by six point four	10 _____ 6.4	Multiplication
thirty times seventeen	30 _____ 17
fifteen point three decreased by point three three	15.3 _____ 0.33
Eighty-two increased by eleven	82 _____ 11
the sum of nineteen and twelve	19 _____ 12
the difference of sixty-five and fifty	65 _____ 50
twenty-two subtracted from two hundred and two	202 ____ 22
the quotient of one-tenth and six-fourths	1/10 ____6/4
sixty-two divided by four	62 _____ 4
One added to seventeen	1 _____ 17
The product of twelve and eight	12 _____ 8
two divided into one thousand	1000 _____ 2

2. Read the following numerical expressions to your partner. S/he will write down what you say. Check the answers. Then ask to repeat the given expressions. Listen to see if s/he repeats correctly. Correct your partner's incorrect answers

A

1. three times twenty –five plus four

2. eighty-one divided by nine

3. thirty decreased by seventeen

4. two times the sum of fifteen and eight

5. the quotient of negative one hundred and fifty-two

B

1. nine-fifths minus two-thirds

2. one-sixth subtracted from three-halves

3. the product of four-thirds and eleven-sixths

4. the quotient of one-half and two thirds

5. eleven divided by fifteen-sixteenths

C

1. point two five times one point six

2. point six plus six point one

3. subtract one point double zeros from six point one

4. the quantity, point five minus point one, times three

5. twice the quotient of one point nine and one point two

3. Look at each numerical expression written in symbols and signs. Then say it in words. Your partner will listen to see if you repeat correctly and correct your incorrect answers

.01 + .9 – 1.7	.067 + 3.004
2(15 + 8) -13	2(61 – 24)
3(20 + 3) + 41	38.4 ÷ 6.01
59.9 ÷ 3.8 - .21	2/3 – 1/10
(4/3) ∙ (11/6) ∙ (15/16)	(15/32 ) ∙ (6/7)
√19 – 6	√75-25
√15 + 50	(93 -43) ÷ 2
(50 +86) 10	√90 + √144

Practice set 9