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1.392.6*192-39260*0.922.3.7*15+21*4.53.0.9999*0.7+0.1111*2.74.(1+0.23+0.34)*(0.23+0.34+0.65)-(1+0.23+0.34+0.65)*(0.23+0.34)以上题目都要简便计算.
题目详情
1 .392.6*192-39260*0.92
2 .3.7*15+21*4.5
3 .0.9999*0.7+0.1111*2.7
4 .(1+0.23+0.34)*(0.23+0.34+0.65)-(1+0.23+0.34+0.65)*(0.23+0.34)
以上题目都要简便计算.
2 .3.7*15+21*4.5
3 .0.9999*0.7+0.1111*2.7
4 .(1+0.23+0.34)*(0.23+0.34+0.65)-(1+0.23+0.34+0.65)*(0.23+0.34)
以上题目都要简便计算.
▼优质解答
答案和解析
1 .3926*192-39260*0.92
=3926*192-3926*92
=3962*(192-92)
=3962*100
=396200
2 .3.7*15+21*4.5
=3.7*15+6.3*15
=(3.7+6.3)*15
=10*15
=150
3 .0.9999*0.7+0.1111*2.7
=0.1111*6.3+0.1111*2.7
=0.1111*(6.3+2.7)
=0.1111*9
=0.9999
4 .(1+0.23+0.34)*(0.23+0.34+0.65)-(1+0.23+0.34+0.65)*(0.23+0.34)
=(0.23+0.34+0.65)+(0.23+0.34)*(0.23+0.34+0.65)-(0.23+0.45)-(0.23+0.45+0.65)*(0.23+0.45)
=(0.23+0.45+0.65)-(0.23+0.45)
=0.65
=3926*192-3926*92
=3962*(192-92)
=3962*100
=396200
2 .3.7*15+21*4.5
=3.7*15+6.3*15
=(3.7+6.3)*15
=10*15
=150
3 .0.9999*0.7+0.1111*2.7
=0.1111*6.3+0.1111*2.7
=0.1111*(6.3+2.7)
=0.1111*9
=0.9999
4 .(1+0.23+0.34)*(0.23+0.34+0.65)-(1+0.23+0.34+0.65)*(0.23+0.34)
=(0.23+0.34+0.65)+(0.23+0.34)*(0.23+0.34+0.65)-(0.23+0.45)-(0.23+0.45+0.65)*(0.23+0.45)
=(0.23+0.45+0.65)-(0.23+0.45)
=0.65
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