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1.5×4+0.5x=9.5 x÷4+0.5x=3 2.5×(6.2-2.6)×0.4 94
1.5×4+0.5x=9.5x÷4+0.5x=32.5×(6.2-2.6)×0.494.8-12.47-10.53+5.228.7-28.7×0.9巧算,求各位大神给过程...
1.5×4+0.5x=9.5
x÷4+0.5x=3
2.5×(6.2-2.6)×0.4
94.8-12.47-10.53+5.2
28.7-28.7×0.9
巧算,求各位大神给过程 展开
x÷4+0.5x=3
2.5×(6.2-2.6)×0.4
94.8-12.47-10.53+5.2
28.7-28.7×0.9
巧算,求各位大神给过程 展开
1个回答
展开全部
1.5×4+0.5x=9.5
6+0.5x=9.5
0.5x=9.5-6
0.5x=3.5
x=3.5÷0.5
x=7
x÷4+0.5x=3
0.25x+0.5x=3
0.75x=3
x=3÷0.75
x=4
2.5×(6.2-2.6)×0.4
=(2.5×0.4)×(6.2-2.6)
=1×3.6
=3.6
94.8-12.47-10.53+5.2
=(94.8+5.2)-(12.47+10.53)
=100-23
=77
28.7-28.7×0.9
=28.7×(1-0.9)
=28.7×0.1
=2.87
6+0.5x=9.5
0.5x=9.5-6
0.5x=3.5
x=3.5÷0.5
x=7
x÷4+0.5x=3
0.25x+0.5x=3
0.75x=3
x=3÷0.75
x=4
2.5×(6.2-2.6)×0.4
=(2.5×0.4)×(6.2-2.6)
=1×3.6
=3.6
94.8-12.47-10.53+5.2
=(94.8+5.2)-(12.47+10.53)
=100-23
=77
28.7-28.7×0.9
=28.7×(1-0.9)
=28.7×0.1
=2.87
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