126*25+168怎样简算

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126*25+168怎样简算
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126*25+168怎样简算
126*25+168怎样简算

126*25+168怎样简算
126×25+168
=25×(4×31+2)+168
=25×4×31+25×2+168
=100×31+50+168
=3100+50+168
=3318
126×25+168
=25×2×63+168
=50×63+168
=3150+168
=3318