如题所述
第1个回答 2022-06-29
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2个回答 2021-06-22
665x5+667x10
=(600+60+5)x5+667x10
=600x5+60x5+5x5+6670
=3000+300+25+6670
=9995
=(600+60+5)x5+667x10
=600x5+60x5+5x5+6670
=3000+300+25+6670
=9995
第3个回答 2022-06-29
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4个回答 2021-06-22
665X5+667ⅹ10=665ⅹ(5+10丿+2ⅹ10=665x15+20=9975十20=9995
第5个回答 2021-06-22
=665*5+667*2*5
=5*(665+667*2)
=5*(665+1334)
=5*1999
=9995
=5*(665+667*2)
=5*(665+1334)
=5*1999
=9995