Math 20-20

Addition

100

234+(-324)

-90

200

1/3 + 1/6

1/2

300

(-4/9) + (2/5)

-2/45

400

Sum of two numbers is 95. If one exceeds the other by 15 find the numbers. 

40,55

Subtraction

100

-234 - 345

-579

200

1/3 - 1/6

1/6

300

(-7/5) - (-2/4)

(-9/10)

400

Two numbers are in the ratio 4:5. If they differ by 18, find these numbers.

72,90

Multiplication

100

(-34) × (46)

-1564

200

5/3 x 9/15

1

300

(5/-18) multiplied by (-9/20)

1/8

400

If 7 times a number is decreased by 33, the result is 15 less than 10 times the number. Find the number.

-6

Division

100

(-315) divided by 9

-35

200

5/3 divided by 9/15

25/9

300

(11/-15) divided by (18/-9)

11/30

400

The denominator of a rational number is greater than its numerator by 8. If the numerator is increased by 17 and the denominator is decreased by 1, the number obtained is 3/2. Find the rational number.

13/21

Algebra

100

4x + 10 = 50 

10

200

3x + 24 = 8x +4

4

300

Solve (2x + 1)/(x + 1) = 5/6

-1/7

400

Indu gives a quarter of her sweets to Bindu and then gives 4 sweets to Sindhu. She has 8 sweets left. How many did he have to start with?

16