420 30ʮ8x25

(4+8)x25=10x25+2x25=250+50=300

10200. mmmmmmm

ԭʽ=400*25+8*25=10000+200=10200;

4x25+8x25=4x25+ 2x4x25=4x25(1+2)=100x3=300

(40+8)x25=40x25+8x25=1000+200=1200

(40+2)X25=40X25+2X25=1000+50=1050

30x25x8=30x(25x8)=30x200=6000 а,Աʿ׷,Good luck!

4X(30X25)=(4x25)x30=100x30=3000 ϣܰﵽ!

ԭʽ=40*25-4*25+8*25+10*25 =1000-100+200+250 =1000+100+250 =1350

:ԭʽ=42x450+42x550=42x(450+550)=42x1000=42000

ĵ

325x113һ325x13
25x12x2ļ
40+8 x25
7500 3 25ļ
40ʮ8 x25
40-8 x25ļ
86x 1000һ2 㷽
24x 2+10
gtbt.net
so1008.com
gmcy.net
jingxinwu.net
mqpf.net
԰