《2025年口算训练五年级数学上册人教版双色升级版》

$2.7×9=$
$3.8×9=$
$7.9×9=$
$8.7×6=$
$170×0.3=$
$501×0.5=$
$39.8×2=$
$271×0.2=$
$30.7×6=$
$390×0.6=$
$780×0.3=$
$204×0.6=$
$240×0.6=$
$360×0.5=$
$205×0.5=$
$109×0.7=$
$200×0.7=$
$170×0.7=$
$120×0.8=$
$102×0.8=$
$1.02×80=$

答案： 解析：这些题目都是基础的乘法口算题，涉及到小数与整数的乘法运算。我们只需要按照乘法运算法则进行计算即可。
答案：
$2.7 × 9 = 24.3$
$3.8 × 9 = 34.2$
$7.9 × 9 = 71.1$
$8.7 × 6 = 52.2$
$170 × 0.3 = 51$
$501 × 0.5 = 250.5$
$39.8 × 2 = 79.6$
$271 × 0.2 = 54.2$
$30.7 × 6 = 184.2$
$390 × 0.6 = 234$
$780 × 0.3 = 234$
$204 × 0.6 = 122.4$
$240 × 0.6 = 144$
$360 × 0.5 = 180$
$205 × 0.5 = 102.5$
$109 × 0.7 = 76.3$
$200 × 0.7 = 140$
$170 × 0.7 = 119$
$120 × 0.8 = 96$
$102 × 0.8 = 81.6$
$1.02 × 80 = 81.6$

$23+16×4=$
$(80-18)÷2=$
$33×2-9=$
$(25+25)÷5=$
$24×2÷4=$
$60-16×3=$
$(54+34)÷4=$
$(100-4)÷3=$
$84÷2+6=$
$(30-1)×3=$
$96÷3-32=$
$50÷5+7=$
$(12+12)×3=$
$(71-11)÷3=$
$69-23×3=$
$(28+20)÷2=$
$42+15×3=$
$(20-6)×6=$
$(36+28)÷4=$
$32-32÷4=$
$88÷4+2=$

答案： 解析：这些题目都是基础的数学运算题目，主要考查四则运算的掌握情况。按照数学运算的优先级，应该先进行括号内的运算，然后进行乘除运算，最后进行加减运算。
答案：
$23 + 16 × 4 = 23 + 64 = 87$
$(80 - 18) ÷ 2 = 62 ÷ 2 = 31$
$33 × 2 - 9 = 66 - 9 = 57$
$(25 + 25) ÷ 5 = 50 ÷ 5 = 10$
$24 × 2 ÷ 4 = 48 ÷ 4 = 12$
$60 - 16 × 3 = 60 - 48 = 12$
$(54 + 34) ÷ 4 = 88 ÷ 4 = 22$
$(100 - 4) ÷ 3 = 96 ÷ 3 = 32$
$84 ÷ 2 + 6 = 42 + 6 = 48$
$(30 - 1) × 3 = 29 × 3 = 87$
$96 ÷ 3 - 32 = 32 - 32 = 0$
$50 ÷ 5 + 7 = 10 + 7 = 17$
$(12 + 12) × 3 = 24 × 3 = 72$
$(71 - 11) ÷ 3 = 60 ÷ 3 = 20$
$69 - 23 × 3 = 69 - 69 = 0$
$(28 + 20) ÷ 2 = 48 ÷ 2 = 24$
$42 + 15 × 3 = 42 + 45 = 87$
$(20 - 6) × 6 = 14 × 6 = 84$
$(36 + 28) ÷ 4 = 64 ÷ 4 = 16$
$32 - 32 ÷ 4 = 32 - 8 = 24$
$88 ÷ 4 + 2 = 22 + 2 = 24$

答案： 解析：题目给出了五组小数乘法的竖式计算。根据小数乘法的规则，先按照整数乘法的方法计算，再根据小数点的位置确定结果的小数点位置。
答案：
1.
$\begin{array}{r}0.38 \\× \quad 0.3 \\\hline0.114 \\\end{array}$
2.
$\begin{array}{r}0.018 \\× \quad 5.4 \\\hline0.0972 \\\end{array}$
3.
$\begin{array}{r}0.45 \\× \quad 28 \\\hline12.60 \\\end{array}$
4.
$\begin{array}{r}600 \\× \quad 0.34 \\\hline204.00 \\\end{array}$
5.
$\begin{array}{r}800 \\× \quad 0.235 \\\hline188.000 \\\end{array}$