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54x125列竖式计算

=6750

式:125 × 50 一一一一一 6250

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. 12 x 125 -------------- 60 24 12 ------------- 1500

125×45=5625; 54×89=4806; 3276÷84=39; 8610÷24=358…18.

39×48×125 =(40-1)×6×8×125 =(40-1)×6×(8×125) =(40-1)×6×1000 =(40-1)×(6×1000) =(40-1)×6000 =40×6000-6000 =24000-6000 =18000

125×24 =125×(8×3) =125×8×3 =(125×8)×3 =1000×3 =3000

125 就是这样 要对齐靠右 答案是15625 x 125 -------- 625 250 125 --------- 15625

125*34 =125*(4*8+2) =1000*4+125*2 =4250 405*16 =(400+5)*16 =400*16+5*16 =6400+80 =6480 47*102 =(50-3)*102 =50*102-3*102 =5100-306 =5100-300-6 =4800-6 =4794

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