329×101
=329×100+329×1
=32900+329
=33229
9×37+9×63
=9×(37+63)
=9×100
=900
25×（20+4）
=25×20+25×4
=500+100
=600
45×7+55×7
=(45+55)×7
=100×7
=700
8×27+8×73
=8×(27+73)
=8×100
=800
504x25
=500×25+4×25
=12500+100
=12600
36×97-58×36+61×36
=36×(97-58+61)
=36×100
=3600
5000÷8÷125
=5000÷(8×125)
=5000÷1000
=5
25x(4+8)
=25×4+25×8
=100+200
=300
84x101
=84×100+84×1
=8400+84
=8484
