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 2.1×(18.84+0.3×2+0.67×2.1)×(63.06+0.3×2+0.67×2.1)+2.1×(7.48+0.3×2+0.67×2.1)×3+2.1×(7.18+0.3×2+0.67×2.1)×3 的值.
    题型：数学计算
    解:
          2.1×(18.84+0.3×2+0.67×2.1)×(63.06+0.3×2+0.67×2.1)+2.1×(7.48+0.3×2+0.67×2.1)×3+2.1×(7.18+0.3×2+0.67×2.1)×3
        =2.1×20.847×(63.06+0.3×2+0.67×2.1)+2.1×(7.48+0.3×2+0.67×2.1)×3+2.1×(7.18+0.3×2+0.67×2.1)×3
        =2.1×20.847×65.067+2.1×(7.48+0.3×2+0.67×2.1)×3+2.1×(7.18+0.3×2+0.67×2.1)×3
        =2.1×20.847×65.067+2.1×9.487×3+2.1×(7.18+0.3×2+0.67×2.1)×3
        =2.1×20.847×65.067+2.1×9.487×3+2.1×9.187×3

        =43.7787×65.067+2.1×9.487×3+2.1×9.187×3
        =2848.548673+2.1×9.487×3+2.1×9.187×3
        =2848.548673+19.9227×3+2.1×9.187×3
        =2848.548673+59.7681+2.1×9.187×3
        =2848.548673+59.7681+19.2927×3
        =2848.548673+59.7681+57.8781
        =2908.316773+57.8781
        =2966.194873
    答案:2.1×(18.84+0.3×2+0.67×2.1)×(63.06+0.3×2+0.67×2.1)+2.1×(7.48+0.3×2+0.67×2.1)×3+2.1×(7.18+0.3×2+0.67×2.1)×3=2966.194873

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