观察下列算式:2+4=6=2×3,2+4+6=12=3×42+4+6+8=20=4×5…然后计算:..[97%]

观察下列算式:2+4=6=2×3,2+4+6=12=3×42+4+6+8=20=4×5…然后计算:2+4+6+…+100=______.

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观察下列各式:12+1=2=1×222+2=6=2×332+3=12=3×442+4=20=4×5试猜想..[97%]

观察下列各式: 12+1=2=1×2 22+2=6=2×3 32+3=12=3×4 42+4=20=4×5 试猜想992+99= ( )。

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34,5,6,9,8,12A.2,36,5,4,1,8,9B.8,3,5,6,2,1,4,9C.9,...[97%]

34,5,6,9,8,12A.2,36,5,4,1,8,9B.8,3,5,6,2,1,4,9C.9,2,5,634,8,1D.4,1,2,6,8,5,9,3

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34,5,6,9,8,12A.2,36,5,4,1,8,9B.8,3,5,6,2,1,4,9C.9,...[97%]

34,5,6,9,8,12A.2,36,5,4,1,8,9B.8,3,5,6,2,1,4,9C.9,2,5,634,8,1D.4,1,2,6,8,5,9,3

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34,5,6,9,8,12A.2,36,5,4,1,8,9B.8,3,5,6,2,1,4,9C.9,...[97%]

34,5,6,9,8,12A.2,36,5,4,1,8,9B.8,3,5,6,2,1,4,9C.9,2,5,634,8,1D.4,1,2,6,8,5,9,3

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34,5,6,9,8,12A.2,36,5,4,1,8,9B.8,3,5,6,2,1,4,9C.9,...[97%]

34,5,6,9,8,12A.2,36,5,4,1,8,9B.8,3,5,6,2,1,4,9C.9,2,5,634,8,1D.4,1,2,6,8,5,9,3

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34,5,6,9,8,12A.2,36,5,4,1,8,9B.8,3,5,6,2,1,4,9C.9,...[97%]

34,5,6,9,8,12A.2,36,5,4,1,8,9B.8,3,5,6,2,1,4,9C.9,2,5,634,8,1D.4,1,2,6,8,5,9,3

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34,5,6,9,8,12A.2,36,5,4,1,8,9B.8,3,5,6,2,1,4,9C.9,...[97%]

34,5,6,9,8,12A.2,36,5,4,1,8,9B.8,3,5,6,2,1,4,9C.9,2,5,634,8,1D.4,1,2,6,8,5,9,3

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34,5,6,9,8,12A.2,36,5,4,1,8,9B.8,3,5,6,2,1,4,9C.9,...[97%]

34,5,6,9,8,12A.2,36,5,4,1,8,9B.8,3,5,6,2,1,4,9C.9,2,5,634,8,1D.4,1,2,6,8,5,9,3

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34,5,6,9,8,12A.2,36,5,4,1,8,9B.8,3,5,6,2,1,4,9C.9,...[97%]

34,5,6,9,8,12A.2,36,5,4,1,8,9B.8,3,5,6,2,1,4,9C.9,2,5,634,8,1D.4,1,2,6,8,5,9,3

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