如图,第二题咋做?
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如图,第二题咋做?
如图,第二题咋做?
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
0.2
把所有数字划掉,然后等于零