用简便的方法计算下面各题
4,5×0.9+5.5×0.9
7.69×101
2.5×(7.2×0.04)
72×l.25
0.26×10.1﹣0.26×0.1
0.25+39×0.25.
①(23+27)×(77+73)×25.
②19×27+190×5+19×23.
③23×2×24+25×4×2+27×1×8+25×8×1.
④1250×32×25.
填一填.
(1)(100+2)×43= ×43+ ×43
(2)9×37+9×63= ×( + )
(3)(100﹣25)×4= ×4﹣25×
(4)a×b+a×c= ×( + )
用简便方法计算.
37×0.125×8
0.4×63×2.5
100﹣63.29﹣36.71
0.02×38.7×50
4.86×9.9
4.9×1.O2.
试题篮
()