(-370)X(-1/4)+0.25X24.5+(-5 1/2)X(-25%) 简便计算
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(-370)X(-1/4)+0.25X24.5+(-5 1/2)X(-25%) 简便计算
(-370)X(-1/4)+0.25X24.5+(-5 1/2)X(-25%)
=(370)×(1/4)+24.5×(1/4)+(5 1/2)×(1/4)
=(370+24.5+5.5)×(1/4)
=(370+(24.5+5.5))×(1/4)
=(370+30)×(1/4)
=400×(1/4)
=100
=(370)×(1/4)+24.5×(1/4)+(5 1/2)×(1/4)
=(370+24.5+5.5)×(1/4)
=(370+(24.5+5.5))×(1/4)
=(370+30)×(1/4)
=400×(1/4)
=100
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