来源:学生作业帮 编辑:大师作文网作业帮 分类:数学作业 时间:2024/09/20 15:08:50
如图,第二题咋做?
=(7.88+6.77+5.66)*(9.13+10.98)+(7.88+6.77+5.66)* 10 -(7.88+6.77+5.66)*(9.13+10.98)-(9.13+10.98)* 10
=(7.88+6.77+5.66)* 10 -(9.13+10.98)* 10
=(7.88+6.77+5.66-9.13-10.98)*10
=((7.88-10.98)+(6.77+5.66-9.13))*10
=(-3.1+3.3)*10
=0.2*10
=0.2