25×32+2.7×680两种简便运算该怎么写?
14个回答
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原式=27×68+25×32
=27×68+25×4×8
=(30-3)×(70-2)+100×8
=30×70-30×2-70×3+3×2+800
=2100-60-210+6+800
=2900-270+6
=2630+6=2636希望采纳,谢谢。
=27×68+25×4×8
=(30-3)×(70-2)+100×8
=30×70-30×2-70×3+3×2+800
=2100-60-210+6+800
=2900-270+6
=2630+6=2636希望采纳,谢谢。
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展开全部
25x32+2.7x680
=25x32+(2.5+0.2)x680
=25x32+(25+2)x68
=25x32+25x68+2x68
=25x100+126
=2626
=25x32+(2.5+0.2)x680
=25x32+(25+2)x68
=25x32+25x68+2x68
=25x100+126
=2626
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25×32+2.7×680
=45×4×8+27×68
=800+27×(70-2)
=800+1890-54
=2690-54
=2636
=45×4×8+27×68
=800+27×(70-2)
=800+1890-54
=2690-54
=2636
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展开全部
25x32+2.7x680
=25x32+(2.5+0.2)x680
=25x32+(25+2)x68
=25x32+25x68+2x68
=25x100+126
=2626
=25x32+(2.5+0.2)x680
=25x32+(25+2)x68
=25x32+25x68+2x68
=25x100+126
=2626
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展开全部
原式=25×32+27×68
=25×32+25×68+2×68
=25×(32+68)+2×68
=25×100+136
=2500+136
=2636
=25×32+25×68+2×68
=25×(32+68)+2×68
=25×100+136
=2500+136
=2636
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