如题所述
第1个回答 2021-06-22
665x5+667x2x5
=3325+1334x5
=3325+6670
=9995
=3325+1334x5
=3325+6670
=9995
第2个回答 2022-06-30
小学6年级下册的题目:用简便算法:905*99+905 ,13*10.2 , 567+98 905*99+905
=905*(99+1)
=90500
13*10.2
=13*(10+0.2)
=130+2.6
=132.6
567+98
=567+100-2
=667-2
=665
=905*(99+1)
=90500
13*10.2
=13*(10+0.2)
=130+2.6
=132.6
567+98
=567+100-2
=667-2
=665
第3个回答 2022-06-30
您好,很高兴能够回答您的问题。可以这样计算。
665×5+(665+2)×10
665×5+665×10+2×10
=665×(5+10)+20
=9975+20
=9995
665×5+(665+2)×10
665×5+665×10+2×10
=665×(5+10)+20
=9975+20
=9995
第4个回答 2022-06-16
665×5+667×10
=665×5+667×2×5
=665×5+1334×5
=5×(665+1334)
=5×1999
=5×(2000-1)
=5×2000-5
=10000-5
=99995
=665×5+667×2×5
=665×5+1334×5
=5×(665+1334)
=5×1999
=5×(2000-1)
=5×2000-5
=10000-5
=99995