1800÷25

= 18× 100÷25

= 18×( 100÷25)

= 18×4

=72

Problem-solving ideas 1, integers have fixed combinations, such as 10=2×5,100 =/kloc-0 ×10, etc. Numbers can be disassembled in this way.

2. Take the topic as an example. There is no fixed disassembly method between 1800 and 25, but 18 can be disassembled into 100 and 18, and 100 can be disassembled into 25 and 4, so the numbers can be decomposed separately.

3. At the end of solving the problem, conduct vertical operation in a normal way to ensure accuracy.