总述：本次共解1题。其中
           ☆算术计算1题

〖1/1算式〗
    作业：求算式 (1.8-0.1)+(1.1-0.1)+(1.4-0.1)+(4.1-0.1)*2+(1.7-0.1)*2+(3.5-0.1)*2+(2.1-0.1)*2 的值.
    题型：数学计算
    解:
          (1.8-0.1)+(1.1-0.1)+(1.4-0.1)+(4.1-0.1)*2+(1.7-0.1)*2+(3.5-0.1)*2+(2.1-0.1)*2
        =1.7+(1.1-0.1)+(1.4-0.1)+(4.1-0.1)*2+(1.7-0.1)*2+(3.5-0.1)*2+(2.1-0.1)*2
        =1.7+1+(1.4-0.1)+(4.1-0.1)*2+(1.7-0.1)*2+(3.5-0.1)*2+(2.1-0.1)*2
        =1.7+1+1.3+(4.1-0.1)*2+(1.7-0.1)*2+(3.5-0.1)*2+(2.1-0.1)*2
        =1.7+1+1.3+4*2+(1.7-0.1)*2+(3.5-0.1)*2+(2.1-0.1)*2
        =1.7+1+1.3+4*2+1.6*2+(3.5-0.1)*2+(2.1-0.1)*2
        =1.7+1+1.3+4*2+1.6*2+3.4*2+(2.1-0.1)*2
        =1.7+1+1.3+4*2+1.6*2+3.4*2+2*2
        =1.7+1+1.3+8+1.6*2+3.4*2+2*2
        =1.7+1+1.3+8+3.2+3.4*2+2*2
        =1.7+1+1.3+8+3.2+6.8+2*2
        =1.7+1+1.3+8+3.2+6.8+4
        =2.7+1.3+8+3.2+6.8+4
        =4+8+3.2+6.8+4
        =12+3.2+6.8+4
        =15.2+6.8+4
        =22+4
        =26
    答案:(1.8-0.1)+(1.1-0.1)+(1.4-0.1)+(4.1-0.1)*2+(1.7-0.1)*2+(3.5-0.1)*2+(2.1-0.1)*2=26

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