166+332+268+184 31×25×4×2
23×8×125 (30﹣8)×25
99×11 36×25×7
172×24﹣172×14 37×49+37
125×24 79×79﹣79+22×79
9×88×125.
用简便方法计算.
(1)2.3×7.6+2.3×12.4
(2)1.25×3.2
(3)8.3×0.125×8
(4)5.9×101﹣5.9
(5)1.35+0.89+2.11
(6)5.12﹣3.43+2.88.
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.
试题篮
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