199又1/2×98+202×199.5等于多少

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199又1/2×98+202×199.5等于多少199又1/2×98+202×199.5等于多少199又1/2×98+202×199.5等于多少199又1/2×98+202×199.5=199.5×9

199又1/2×98+202×199.5等于多少
199又1/2×98+202×199.5等于多少

199又1/2×98+202×199.5等于多少
199又1/2×98+202×199.5
=199.5×98+202×199.5
=(98+202)×199.5
=300×(200-0.5)
=300×200-300×0.5
=60000-150
=59850

59850