①1114×719-719×214+719②1983×668+6483×666③0.25×32×0.125④16+112+120+130+142+156+172+190+1110.-数学
题文
①11
②
③0.25×32×0.125 ④
|
答案
①11
=(11
=10×7
=10×(7+
=10×7+10×
=70+1
=71 |
题文
①11
②
③0.25×32×0.125 ④
|
答案
①11
=(11
=10×7
=10×(7+
=10×7+10×
=70+1
=71 |