## Use 3,4,6,10 to calculate 24 points by addition, subtraction, multiplication and division

Use 4 numbers in 3.4.2.10 to calculate 24 points by addition, subtraction, multiplication and division. The formula is

3 × 4=12,2+10=12 12+12=24

Xiao Ming read a story book. On the first day, he read one third of the whole book. On the second day, he read the remaining half. On the third day, he read 60 pages,

How many pages does the story book total?

analysis:

Equivalency relationship:

There are 38 people in the class. They have rented 8 boats. The big boat can take 6 people and the small boat can take 4 people. Now every boat is full. How many boats have they rented?

analysis:

Equivalency relationship:

Analysis: set the total number of pages of the book as X, read 1 / 3x the first day, 2 / 3x the next day, and then multiply by 1 / 2

Equivalent relation: 1 / 3x + 1 / 3x + 60 = x

X=180

Analysis: set big ship X and small boat y

x+y=8

6X + 4Y = 38 gives x = 3 and y = 5

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