用简便方法运算1.25x0.25x3232x9.1 11.8x43-860x0.09

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/07 13:25:55
用简便方法运算1.25x0.25x3232x9.1 11.8x43-860x0.09

用简便方法运算1.25x0.25x3232x9.1 11.8x43-860x0.09
用简便方法运算1.25x0.25x3232x9.1 11.8x43-860x0.09

用简便方法运算1.25x0.25x3232x9.1 11.8x43-860x0.09
1.25 × 0.25 × 3232 × 9.1
= 1.25 × 0.25 × 4 × 8 × 101 × 9.1
= (1.25 × 8)× (0.25 × 4)× (100 - 1)× 9.1
= 10 × 1 × 100 × 9.1 - 1 × 9.1
= 10 × 910 - 9.1
= 9100 - 9.1
= 9090.9
11.8 × 43 - 860 × 0.09
= 11.8 × 43 - 43 × 2 × 10 × 0.09
= 11.8 × 43 - 43 × 1.8
= 43 × (11.8 - 1.8)
= 43 × 10
= 430
【俊狼猎英】团队为你解答