512乘以81+11乘以825+637乘以19 简算

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512乘以81+11乘以825+637乘以19 简算

512乘以81+11乘以825+637乘以19 简算
512乘以81+11乘以825+637乘以19 简算

512乘以81+11乘以825+637乘以19 简算
512x81+11x825+637x19
=512x81+11x(700+125)+(512+125)x19
=512x81+11x700+11x125+512x19+125x19
=512x(81+19)+11x700+(11+19)x125
=51200+7700+3750
=62650

512*81 + 11*825 + 637*19 = 512*(80+1) +(10+1)*825 + 637*(20-1)
= 20480 + 512 + 8250 + 825 + 12740 - 637
= 20480 +8250 + 12740 + 512 + 825 - 637
= 28730 + 12740 + 512 + 188
= 41470 + 700
= 42170

=512乘以81+512乘以19+125乘以11+125乘以8+825乘以11=512乘以100+125乘以8+11乘以1000=51200+1000+11000=63200