《2025年速算天地数学口算心算五年级上册苏教版》

1-0.5=0.5 6+3.1=9.1
7.8-6=1.8 6.9+2.1=9
5.7+1.4=7.1 8.78-3.4=5.38
4.9+7=11.9 1.78+9.2=10.98
3.5-0.5=3 8.41-3=5.41
5.5-3.1=2.4 4.4+9=13.4
9.5+0.1=9.6 5.2-1.3=3.9
100×40=4000 2+9.8=11.8
5.37-3.6=1.77 9.18-5=4.18
7.8-6.15=1.65 8+1.2=9.2
7.82+2.45=10.27 7.1+2.3=9.4
0.82-0.2=0.62 2.93-0.3=2.63
9.9-1.2=8.7 6.65-3.5=3.15
8.5+0.15=8.65 8.4+6.6=15
0.58-0.49=0.09 5.8-0.6=5.2
6.2+4.1=10.3 5.1-0.8=4.3
1.3+4.7=6 9.38-1.2=8.18
7.1-6.4=0.7 2.75-1.2=1.55
1-0.78=0.22 7.2+9.1=16.3
10.7-6.92=3.78 11.6-0.6=11

答案： 解析：这些题目都是基础的加减法和乘法运算，主要考查速算能力。
答案：
$1 - 0.5 = 0.5$
$6 + 3.1 = 9.1$
$7.8 - 6 = 1.8$
$6.9 + 2.1 = 9$
$5.7 + 1.4 = 7.1$
$8.78 - 3.4 = 5.38$
$4.9 + 7 = 11.9$
$1.78 + 9.2 = 10.98$
$3.5 - 0.5 = 3$
$8.41 - 3 = 5.41$
$5.5 - 3.1 = 2.4$
$4.4 + 9 = 13.4$
$9.5 + 0.1 = 9.6$
$5.2 - 1.3 = 3.9$
$100 × 40 = 4000$
$2 + 9.8 = 11.8$
$5.37 - 3.6 = 1.77$
$9.18 - 5 = 4.18$
$7.8 - 6.15 = 1.65$
$8 + 1.2 = 9.2$
$7.82 + 2.45 = 10.27$
$7.1 + 2.3 = 9.4$
$0.82 - 0.2 = 0.62$
$2.93 - 0.3 = 2.63$
$9.9 - 1.2 = 8.7$
$6.65 - 3.5 = 3.15$
$8.5 + 0.15 = 8.65$
$8.4 + 6.6 = 15$
$0.58 - 0.49 = 0.09$
$5.8 - 0.6 = 5.2$
$6.2 + 4.1 = 10.3$
$5.1 - 0.8 = 4.3$
$1.3 + 4.7 = 6$
$9.38 - 1.2 = 8.18$
$7.1 - 6.4 = 0.7$
$2.75 - 1.2 = 1.55$
$1 - 0.78 = 0.22$
$7.2 + 9.1 = 16.3$
$10.7 - 6.92 = 3.78$
$11.6 - 0.6 = 11$