《2025年口算训练五年级数学上册人教版双色升级版》

$0.5×2=$
$0.6×3=$
$0.35×4=$
$0.2×2=$
$0.6×6=$
$×0.9=$
$×0.04=$
$×0.15=$
$×3.5=$
$×0.18=$
$×3.4=$
$0.6×2=$
$0.84×10=$
$0.4×3=$
$×0.18=$
$0.9×0=$
$0.6×3=$
$0.7×9=$
$0.3×2=$
$0.01×0=$
$0.19×3=$

答案： 解析：本题主要考查小数乘法的口算。
答案：
$0.5×2=1$
$0.6×3=1.8$
$0.35×4=1.4$
$0.2×2=0.4$
$0.6×6=3.6$
题目中“$×0.9=$”，“$×0.04=$”，“$×0.15=$”，“$×3.5=$”，“$×0.18=$”，“$×3.4=$”缺少乘数，无法计算。
$0.6×2=1.2$
$0.84×10=8.4$
$0.4×3=1.2$
题目中“$×0.18=$”缺少乘数，无法计算。
$0.9×0=0$
$0.6×3=1.8$
$0.7×9=6.3$
$0.3×2=0.6$
$0.01×0=0$
$0.19×3=0.57$

$1.7×0.7=$
$0.8÷8=$
$4.8÷1.2=$
$3.5÷0.5=$
$4.1×3=$
$7.1×0.7=$
$5.6×0.6=$
$12.6×0.5=$
$2.5×0.7=$
$5.2×0.4=$
$0.75×0.2=$
$0.6×55=$
$30×2.5=$
$2.2×0.32=$
$416÷40=$
$0.63÷0.09=$
$0.54×0.2=$
$1.8×0.3=$
$3.05×0.3=$
$9.5×0.03=$
$0.35×0.2=$

答案： 解析：这些题目都是基础的数学运算，包括乘法和除法，涉及到小数和整数的运算。我们需要按照运算规则，逐一计算每个表达式的结果。
答案：
$1.7 × 0.7 = 1.19$
$0.8 ÷ 8 = 0.1$
$4.8 ÷ 1.2 = 4$
$3.5 ÷ 0.5 = 7$
$4.1 × 3 = 12.3$
$7.1 × 0.7 = 4.97$
$5.6 × 0.6 = 3.36$
$12.6 × 0.5 = 6.3$
$2.5 × 0.7 = 1.75$
$5.2 × 0.4 = 2.08$
$0.75 × 0.2 = 0.15$
$0.6 × 55 = 33$
$30 × 2.5 = 75$
$2.2 × 0.32 = 0.704$
$416 ÷ 40 = 10.4$
$0.63 ÷ 0.09 = 7$
$0.54 × 0.2 = 0.108$
$1.8 × 0.3 = 0.54$
$3.05 × 0.3 = 0.915$
$9.5 × 0.03 = 0.285$
$0.35 × 0.2 = 0.07$

$70÷50=$1.4
$60÷40=$1.5
$52÷20=$2.6
$19÷10=$1.9
$16÷80=$0.2
$2.1÷0.7=$3
$0.48÷0.6=$0.8
$3.5÷0.5=$7
$4.2÷0.7=$6
$0.44÷0.1=$4.4
$0.56÷0.7=$0.8
$0.36÷0.9=$0.4
$100÷400=$0.25
$300÷400=$0.75
$800÷500=$1.6
$600÷800=$0.75
$10.8÷0.2=$54
$0.51÷0.3=$1.7
$0.75÷1.5=$0.5
$1.64÷41=$0.04
$4.95÷90=$0.055

答案： 解析：这些题目都是基础的除法运算题，主要考察的是除法运算的掌握。根据除法的定义，将被除数除以除数，得出商。如果除不尽，根据题目要求，我们可以保留到小数点后三位。
答案：
$70÷50=1.4$
$60÷40=1.5$
$52÷20=2.6$
$19÷10=1.9$
$16÷80=0.2$
$2.1÷0.7=3$
$0.48÷0.6=0.8$
$3.5÷0.5=7$
$4.2÷0.7=6$
$0.44÷0.1=4.4$
$0.56÷0.7=0.8$
$0.36÷0.9=0.4$
$100÷400=0.25$
$300÷400=0.75$
$800÷500=1.6$
$600÷800=0.75$
$10.8÷0.2=54$
$0.51÷0.3=1.7$
$0.75÷1.5=0.5$
$1.64÷41=0.04$
$4.95÷90=0.055$