发
追答25X37X4
=(25X4)X37
=100X37
=3700
(125X12)X8
=(125X8)X12
=1000X2
=12000
27X45+27X55
=27X(45+55)
=27X100
=2700
44×25
=(40+4)x25
=40×25+4×25
=1000+100
=1100
13×102
=13×100+13×2
=1300+26
=1326
800÷25
=100×8÷25
=100÷25×8
=4x8
=32
169+78+22
=169+(78+22)
=169+100
=269
138+293+62+107
800÷25
=100×8÷25
=100÷25×8
=4x8
=32