更新时间2023-09-21 00:40:10
9.8×25
=(10-0.2)×25
=10×25-0.2×25
=250-5
=245
无副题
9.8×25
=(10-0.2)×25
=10×25-0.2×25
=250-5
=245
(10-0.2)*25=10*25-0.2*25
9.8乘25简便计算
“ 9.8乘25=(10-0.2)×25=10×25-0.2×25=250-5=245 ”
10*25-0.2*25
=250-5
=245
9.8×25
=(10-0.2)×25
=10×25-0.2×25 (乘法分配律)
=250-5
=245
9.8*25
=25×(10-0.2)
=250-5
=245
9.8*25
=(10-0.2)*25
=10*25-0.2-25
=250-5
=245
9.8×25
=10×25-0.2×25
=250-5
=245
9.8×25
=﹙10-0.2﹚×25
=10×25-0.2×25
=250-5
=245
9.8*25
=(10-0.2)×25
=10×25-0.2×25
=250-5
=245