157×77的积是( )
直接写出得数. ①2.5×3.5×0.4= ②25.78﹣14.2﹣5.78= ③9﹣9÷11= ④8×12.5%=⑤99×99= ⑥12×(+)= ⑦1﹣1÷9= ⑧=
2222×17+3333×4+6666×97.68﹣3.56+2.32﹣5.441.25×3.2×0.25 (0.625×6.8+0.625×4.2﹣0.625)÷0.625300÷0.125÷0.8 4000﹣1﹣2﹣3﹣…﹣77﹣78.
直接写出下面各题的得数:(1)175%+= (2)10÷10%= (3)﹣÷4= (4)+×=(5)1×+÷= (6)= (7)(9.9+)÷0.9= (8)0.9+99×0.9=(9)×÷×= (10)(9.3×﹣7.3)÷=
计算(能简算的要简算) 7.24×0.1+0.5×72.4+0.049×724 +++2012÷2012(3+÷+3)﹣(7×÷7×)
计算(写出计算过程,能简算的要简算)2﹣(6÷0.5﹣3×3)÷5+5×0.8 4×(+﹣)÷1.25×3.45×6.789+3.75×1.15×1.211 .