Current location - Training Enrollment Network - Mathematics courses - Measurement and control of famous teachers in the third grade of primary school: which three-digit sum is exactly 60 in the calendar of August 20 14? How to calculate?
Measurement and control of famous teachers in the third grade of primary school: which three-digit sum is exactly 60 in the calendar of August 20 14? How to calculate?
60÷3=20

20- 1= 19

20+ 1=20

First, determine that three consecutive numbers are:

19、20、2 1.

Next, you can add and subtract between these three numbers, adding a few to one number and subtracting a few from the other two numbers.

You can get:

14+ 15+3 1=60

13+ 16+3 1=60

12+ 17+3 1=60

……

1+28+3 1=60

14+ 16+30=60

13+ 17+30=60

……

1+29+30=60

14+ 17+29=60

……

3+28+29=60

14+ 18+28=60

……

5+27+28=60

14+ 19+27=60

……

7+26+27=60

14+20+26=60

……

9+25+26=60

14+2 1+25=60

……

1 1+24+25=60

14+22+24=60

13+23+24=60

……

For reference.