脱式计算 54÷6+36 = = 竖式计算 28×31= 69×28= 554÷6= 三年级数学下册脱式计算及答案 1000-627+284 = = 28÷(71-67) = = 52×35= 702÷8= 175÷5= 121-69÷3 = =
【答案】 28×31=868 52×35=1820 69×28= 1932 702÷8= 87……6 554÷6= 92……2 脱式计算 (35 360 45) 2003 9975 1740 145 求未知数 x x 116 414 396 x 8043 (35 360 45) 2003 =6729 求未知数 x(8 分) x 116 414 x=530 x 32 2176 x=68 9975 1740 145 =9963 396 x 8043 x=7647 8235 x 27
62×7.1+2.9,
=440.2+2.9,
=443.1；
4.2×0.25,
=（4+0.2）×0.25,
=4×0.25+0.2×0.25,
=1+0.05,
=1.05；
