125×[80＋8] 36×68＋68×64 37×101-37 47×98 108×8 92＋9×92 = = = = = = = = = = = = = = = =
问题描述：
125×[80＋8] 36×68＋68×64 37×101-37 47×98 108×8 92＋9×92 = = = = = = = = = = = = = = = =
用乘法分配律算....
答
125×[80＋8]=125×80＋125×8=10000+1000=1100036×68＋68×64=68x(36+64)=68x100=680037×101-37= 37×(100+1)-37=37x100+37x1-37=3700+37-37=370047×98= 47×(100-2)=47x100-2x47=4700-94=4606108×8=(100+8)x8=...