38×37+62×47怎么简算(
38×37+62×47怎么简算? -
=(38+62)×37+620 =100×37+620 =3700+620 =4320
=47*(38+23)39*53 =47*61+39*53 =2867+2067 =4934
=(38+62)×37+620 =100×37+620 =3700+620 =4320
=47*(38+23)39*53 =47*61+39*53 =2867+2067 =4934
=(34+65)×7 =99×7 =100×7-7 =700-7 =693。
=62*(37+38+35)62*100 =6200 乘法分配律,
38x32 83x87 (怎么简算) -
回答:38x32=1216 83x87=7221 k,a,b为自然数,k>0,a+b=10,(k*10+a)(k*10+b)=k(k+1)*100+ab 证明: (k*10+a)(k*10+b) =k^2*100+(a+b)*k*10+ab =k^2*100+k*100+ab =k(k+1)*100+ab
34×7 =(30+4)×7=30×7+4×7=210+28=238 65×7 =(60+5)×7=60×7+5×7=420+35=455 738×38=738×(40-2)=738×40-738×2 =29520-1476=28044 38×62=(40-2)×62=40×62-2×62 =2480-24=2356
但38x547 447x38怎么简算?(用运算定律) -
题目应该是这样:38x547-447x38 此题可以应用乘法分配律进行简算:a×c-b×c=(a-b)×c 38x547-447x38 =(547-447)×38 =100×38 =3800
76×38-38×24怎么简算76×38-38×24 =(76-24)×38 =100×38 =3800
38x27十62x27怎么简算你会不会 -
38x27+62x27 =27x(38+62)=27x100 =2700 如有帮助请采纳,如对本题有疑问可追问,Good luck!
38×43+43×26的简便运算是,43乘以括号,38+26括号,这样算比较简便,