MULTIPLYING RATIONAL NUMBERS WORD PROBLEMS
Problem 1 :
A student can eat 1/8 of a pizza. If there are 40 students in David's class, how many pizzas does David need ?
Solution :
To find how many pizzas that David needs, we have to multiply 40 and 1/8.
Step 1 : Multiply 40 by 1/8
40 x 1/8
Step 2 : Simplify
5 x 1/1
Step 3 : Multiply
5 x 1/1 = 5
So, David needs 5 pizzas.
Problem 2 :
There are 450 students in school. If 4/9 th of the students are boys, find the number girls in the school.
Solution :
If 4/9 of the students are boys, then 5/9 th of the students are girls. Because 9 - 4 = 5.
To find number of girls, we have to multiply 450 by 5/9.
Step 1 : Multiply 450 by 5/9
450 x 5/9
Step 2 : Simplify
50 x 5/1
Step 3 : Multiply
50 x 5/1 = 250
So, there are 250 girls in the school.
Problem 3 :
The science teacher is filling her new fish aquarium. The aquarium holds 40 gallons. If she fills the aquarium 4/5 of the way full, how many gallons will she need?
Solution :
If 4/5 of the aquarium is filled, then 1/5 th of the aquarium to be filled to make it full. Because 5 - 4 = 1.
To find number of gallons, we have to multiply 40 by 1/5.
Step 1 : Multiply 40 by 1/5
40 x 1/5
Step 2 : Simplify
8 x 1/1
Step 3 : Multiply
8 x 1/1 = 8
So, the science teacher needs 8 gallons to make the aquarium full.
Problem 4 :
A baker needs to make 8 batches of cookies for a party. If each batch requires 2 3/4 cups of flour, how many cups will he need ?
Solution :
To find number of cups needed, we have to multiply 8 by 2 3/4.
Step 1 : Multiply 8 by 2 3/4
8 x 2 3/4
Step 2 : Simplify
8 x 11/4 = 2 x 11/1
Step 3 : Multiply
2 x 11/1 = 22
So, the baker needs 22 cups of flour to make 8 batches of cookies.
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WORD PROBLEMS
Word problems on simple equations
Word problems on linear equations
Word problems on quadratic equations
Area and perimeter word problems
Word problems on direct variation and inverse variation
Word problems on comparing rates
Converting customary units word problems
Converting metric units word problems
Word problems on simple interest
Word problems on compound interest
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Word problems on sets and venn diagrams
Pythagorean theorem word problems
Percent of a number word problems
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Word problems on average speed
Word problems on sum of the angles of a triangle is 180 degree
OTHER TOPICS
Time, speed and distance shortcuts
Ratio and proportion shortcuts
Domain and range of rational functions
Domain and range of rational functions with holes
Graphing rational functions with holes
Converting repeating decimals in to fractions
Decimal representation of rational numbers
Finding square root using long division
L.C.M method to solve time and work problems
Translating the word problems in to algebraic expressions
Remainder when 2 power 256 is divided by 17
Remainder when 17 power 23 is divided by 16
Sum of all three digit numbers divisible by 6
Sum of all three digit numbers divisible by 7
Sum of all three digit numbers divisible by 8
Sum of all three digit numbers formed using 1, 3, 4
Sum of all three four digit numbers formed with non zero digits
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