发布网友 发布时间:2024-10-24 13:15
共5个回答
热心网友 时间:2024-11-14 09:24
解:
0.84×35+39÷2.6
=0.84x30+0.84x5+(13x3)÷(13x0.2)
=25.2+4.2+3÷0.2
=29.4+15
=44.4
热心网友 时间:2024-11-14 09:25
简便计算怎么算
0.84×35+39÷2.6
=29.4+15
=44.4
热心网友 时间:2024-11-14 09:25
0.84×35+39÷2.6
=0.42x2x5x7+13x3x13x0.2
=0.42x10x7+13x13x0.6
=4.2x7+13x13x0.6
=0.6x(7x7+13x13)
=0.6x[(10-3)^2+(10+3)^2]
=0.6x[(10^2-2x10x3+3^2)+(10^2+2x10x3+3^3)]
=0.6x2x(10^2+3^2)
=1.2x(100+9)
=1.2x(100+10-1)
=120+12-1.2
=130.8
热心网友 时间:2024-11-14 09:26
0.84×35+39÷2.6
=0.42x2x35+39÷13÷0.2
=0.42x70+3÷0.2
=4.2x7+1.5
=29.4+1.5
=30.9
热心网友 时间:2024-11-14 09:26
用计算机算