解答!解方程上面是简便计算!谢谢!
2个回答
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9.68×101=9.68×100+9.68×1=968+9.68=977.68
12.5×4×2.5×12=12.5×(4×2.5)×12=12.5×10×12=125×12=1500
9.6÷(9.6×4)=(9.6÷9.6)÷4=1÷4=0.25
0.78÷0.25÷4=0.78÷(0.25×4)=0.78÷1=0.78
解方程:0.2x-9.7=14.5 0.2x=14.5+9.7 0.2x=24.2 x=121
3(x+2.1)=10.5 x+2.1=3.5 x=3.5-2.1 x=1.4
x-0.36x=16 0.64x=16 x=25
12.5×4×2.5×12=12.5×(4×2.5)×12=12.5×10×12=125×12=1500
9.6÷(9.6×4)=(9.6÷9.6)÷4=1÷4=0.25
0.78÷0.25÷4=0.78÷(0.25×4)=0.78÷1=0.78
解方程:0.2x-9.7=14.5 0.2x=14.5+9.7 0.2x=24.2 x=121
3(x+2.1)=10.5 x+2.1=3.5 x=3.5-2.1 x=1.4
x-0.36x=16 0.64x=16 x=25
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