3.75×15+6.25×11简便运算?
3个回答
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3.75×15+6.25×11
=3.75×10+3.75×5+6.25×10+6.25×1
=10×(3.75+6.25)+4×5-0.25×5+6.25
=10×10+20-1.25+6.25
=100+25
=125
=3.75×10+3.75×5+6.25×10+6.25×1
=10×(3.75+6.25)+4×5-0.25×5+6.25
=10×10+20-1.25+6.25
=100+25
=125
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3.75x15+6.25x11
3.75x(11+5)+6.25x11
=3.75x11+3.75x5+6.25x11
=11x(3.75+6.25)+18.75
=11X10+18.75
=110+18.75
=128.75
3.75x(11+5)+6.25x11
=3.75x11+3.75x5+6.25x11
=11x(3.75+6.25)+18.75
=11X10+18.75
=110+18.75
=128.75
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3.75×15+6.25×11=(1.25×3×3×5)+(1.25×5×11)=(1.25×5)×(9+11)=6.25×20=125
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