(1)买2个乒乓球拍要用多少元?(2)小东要买1个皮球和1支笔,带40元钱够吗?(3)你还能提一个用乘法计算的问题吗?( 并列式解答)
脱式计算:(7.5+2.5)×0.25 475÷25÷4 5.4÷18+12999×1999+999 2.25×1.8+17.5×0.18 [1﹣(+)]×36.
25×0.4+1.69÷1.3 17.8×0.8+17.8×0.2 10.1×9.8.
能简算的用简便方法算.2.5×3.4×0.4 8.24﹣2.68﹣1.32 6.5×2.3+6.5×6.7+6.57.8÷0.25÷4 1.37×99 2.5×32×1.25.
能简算的用简便方法算.9.28+1.82÷0.7 (71.2﹣71.2×0.9)÷0.25 6.5×2.3+6.5×6.7+6.57.8÷0.25÷4 1.37×99+1.37 4.8×6.2﹣12.4.
怎样算简便就怎样算.(1)4.32+5.43+6.68 (2)15.17﹣6.8﹣3.2 (3)34.82﹣(4.82+15.2)(4)15.27+4.72﹣5.28 (5)4.02﹣3.5+0.98 (6)5.8﹣4.5+5.8﹣4.5.