25x204
=25X(200+4)
=25X200+25X4
=5000+100
=5100
希望对你有帮助,满意请及时采纳,
你的采纳是我回答的动力!
=(200+4)x25
=200x25+4x25
=5000+100
=5100
398×25
=(400-2)×25
=400×25-2×25
=10000-50
=9950
44×25=(40+4)×25
=40×25+4×25
=1000+100=1100
20×(13+27)
36×205
=36×(200+5)
=36×200+36×5
=7200+180
=7380
这道题这样算…
11×4×25=11×100=1100,
就是这样的!
65X25十35X25十25=25×(65+35+1)=25×101=2525
198乘25
=(200-2)*25
=200*25-2*25
=5000-50
=4950
不懂可追问,有帮助请采纳,谢谢!
25×198
=25 ×(200-2)
=25 ×200-25 ×2
=5000-50
=4950