74×25+25÷ 2 简便算法式子

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74×25+25÷ 2 简便算法式子
74×25+25÷ 2 简便算法式子

74×25+25÷ 2 简便算法式子
74×25+25÷ 2
=76×25-2×25+25×1/2
=4×19×25-50+12.5
=19×(4×25)-37.5
=1900-37.5
=1862.5

74×25+25÷ 2
=25*(74/2)
=25*37
=925

74*25+25/2
=(70+4)*25+25*(1/2)
=(70*25+4*25)+25*(1/5+3/10)
=(1750+100)+25*(1/5)+25*(3/10)
=1850+5+7.5
=1850+12.5
1862.5