口算 0.7×0.1= 5.4÷0.9= 0.8×1000= 4.2×0.2=5.05÷5= 16.8÷4= 9.09÷3= 0.4×0.25=
计算下面各题,能简算的要简算.(1)975﹣384÷16×25 (2)÷(+)+1.65 (3)5.25+3﹣1.8+2(4)×1.5﹣1.5× (5)12.5×0.25×32 (6)36×(+)÷2%
直接写得数(1)1997+19998+1999+6= (2)3.6÷0.36= (3)41×101= (4)﹣+= (5)0.22= (6)(50+)×= (7)×10÷×10= (8)0.75×+×= .
合理、灵活地计算32×61.9+38.1×32 25×16×50×0.13 ×[0.75﹣(﹣)] (1﹣)÷[(0.1+1.1)÷0.2].
(1) (2)(3) (4).
计算(1)+9+999+9999 (2)4(2)(3)351 (4)(111+999).