如题所述
第1个回答 2016-04-19
(25十32)x4
=25x4+32x4
=100+128
=228;
76x99十76
=(99+1)x76
=100x76
=7600;
101x86
=(100+1)x86
=100x86+1x86
=8600+86
=8686.
供参考。
=25x4+32x4
=100+128
=228;
76x99十76
=(99+1)x76
=100x76
=7600;
101x86
=(100+1)x86
=100x86+1x86
=8600+86
=8686.
供参考。
第2个回答 2016-04-19
(25十32)x4
=25*4+32*4
=100+128
=228
76x99十76
=(99+1)*76
=100*76
=7600
101x86
=(100+1)*86
=100*86+86
=8600+86
=8686
=25*4+32*4
=100+128
=228
76x99十76
=(99+1)*76
=100*76
=7600
101x86
=(100+1)*86
=100*86+86
=8600+86
=8686
第3个回答 2016-04-19
(25+32)*4=(25+25+7)*4=100+100+28=228
76*99+76=76*(99+1)=7600
101*86=(100+1)*86=8600+86=8686
76*99+76=76*(99+1)=7600
101*86=(100+1)*86=8600+86=8686
第4个回答 2016-04-19