问题标题:
2道数学计算题580×7.9+33×79-910×2.9=2009÷37+300÷(37×3)=
问题描述:
2道数学计算题
580×7.9+33×79-910×2.9=
2009÷37+300÷(37×3)=
何婷婷回答:
(1)原式=1580*2.9-910*2.9+330*7.9
=(1580-910)*2.9+330*7.9
=330*2.9+330*7.9
=330*(2.9+7.9)
=3564
(2)原式=2009/37+300/37/3
=2009/37+100/37
=(2009+100)/37
=57
呵呵,以后要会做哦
郝嘉伍回答:
收到
何婷婷回答:
呵呵,第一道错了原式=1580*2.9-910*2.9+330*7.9=(1580-910)*2.9+330*7.9=670*2.9+330*7.9=330*2*2.9+10*2.9+330*7.9=(5.8+7.9)*330+29=4550
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