(25+18)X8 = =
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(25+18)X8==(25+18)X8==(25+18)X8==34443x8344344
(25+18)X8 = =
(25+18)X8 = =
(25+18)X8 = =
344
43x8
344
344
(25+18)X8 = =
50+( )x8=25
(125+6)X8=( )x8+( )x8
(125x8)+(25x4)=?
25x4=和125x8=
25%x=16x8分之5,
125x8=?
口算125x8=125x8=一定要口算
8X4.6+3.5X8+4.4X8=求这道题简算
3/4×27×5/18x8/9=?简便计算
41.2x8.1+11x9.25+537x0.19=?
41.8x8.1+11x1.25+53.7x1.9=?
4x12.5x0.25x8=(4x0.25)x(12.5x8),计算的依据是
(5x―15)x8=72
(5x-15)X8=72
(5x-12)x8=24
找规律:1x8+1=9 12x8+2=98 123x8+3=987……123456x8+6=?
1x8+1=9,12x8+2=98,123x8+3=987,1234x8+4=9876照样子继续四道这样的题?