2.99×22+88×33+77×44+66×55简便运算?
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2.99×22+88×33+77×44+66×55
=2.99×22+11×11(8×3+7×4+6×5)
=65.78+121×(24+28+30)
=65.78+121×82
=65.78+9922
=9987.78
=2.99×22+11×11(8×3+7×4+6×5)
=65.78+121×(24+28+30)
=65.78+121×82
=65.78+9922
=9987.78
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2020-02-09
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99×22+88×33+77×44+66×55
=11x9x11x2+11x8x11x3+11x7x11x4+11x6x11x5
=11x11x(18+24+28+30)
=121x100
=12100
=11x9x11x2+11x8x11x3+11x7x11x4+11x6x11x5
=11x11x(18+24+28+30)
=121x100
=12100
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