一.计算,怎样简便怎样算270+35*63.6/0.4-1.3*51.8*(4.2-1.8)÷0.91.25*7.3*0.8(4.3-3.05)*(2.7+0.5)0.8*【(5-0.68)÷1.2】2/3-8/9÷5/6*3/16(1-1/4*8/9)÷7/925÷14+17*1/143/4-8/25+1/4-17/255÷7-1/14÷1/8(5/12-1/19)*12-7/19

问题描述:

一.计算,怎样简便怎样算
270+35*6
3.6/0.4-1.3*5
1.8*(4.2-1.8)÷0.9
1.25*7.3*0.8
(4.3-3.05)*(2.7+0.5)
0.8*【(5-0.68)÷1.2】
2/3-8/9÷5/6*3/16
(1-1/4*8/9)÷7/9
25÷14+17*1/14
3/4-8/25+1/4-17/25
5÷7-1/14÷1/8
(5/12-1/19)*12-7/19

1.270+35×6
=45×6+35×6
=80×6
=480
2.6÷0.4-1.3×5
=1.3×2×5/2-1.3×5
=0
1.8×(4.2-1.8)÷0.9
=1.8×(4.2-1.8)×10/9
=2×2.4
=4.8
1.25×7.3×0.8
=1.25×0.8×7.3
=1×7.3
=7.3
0.8*【(5-0.68)÷1.2】
0.8*[4.32/1.2]
0.8*36
28.8
2/3-8/9÷5/6*3/16
2/3-15/16*3/16
15/7
(1-1/4*8/9)÷7/9
(1-2/9)/7/9
7/9*9/7
1
25÷14+17*1/14
25/14+17/14
3
3/4-8/25+1/4-17/25
1+1
2
5÷7-1/14÷1/8
5/7-8/14
1/7
(5/12-1/19)*12-7/19
=5-12\19-7\19
=5-(12+7)\19
=5-1
=4

额 孩纸 我忘了怎么简便做了

请稍等,我正在打字 270+35*6270+210=4803.6/0.4-1.3*59-6.53.51.8*(4.2-1.8)÷0.91.8/0.9*2.42*2.44.81.25*7.3*0.81.25*0.8*7.31*7.37.30.8*【(5-0.68)÷1.2】0.8*[4.32/1.2]0.8*3628.82/3-8/9÷5/6*3/162/3-15/...

1.270+35×6
=45×6+35×6
=80×6
=480
2.6÷0.4-1.3×5
=1.3×2×5/2-1.3×5
=0
1.8×(4.2-1.8)÷0.9
=1.8×(4.2-1.8)×10/9
=2×2.4
=4.8
1.25×7.3×0.8
=1.25×0.8×7.3
=1×7.3
=7.3