《2025年灵机一动口算心算四年级数学上册苏教版》

240÷60=4
210÷30=7
180÷90=2
360÷90=4
800÷8=100
19×20=380
13×20=260
28×2=56
13×5=65
15×3=45
50×70=3500
60×50=3000
400÷50=8
22×4=88
50×50=2500
20×5=100
16×5=80
12×70=840
33×3=99
140-90=50
54+45=99
32+39=71
29+37=66
30-17=13
15×40=600
11×8=88
17×5=85
64÷16=4
240÷40=6
720÷24=30
42÷14=3
300÷5=60
540÷6=90
48+52=100
27+24=51
130-80=50
72-43=29
25×30=750
240÷6=40
600÷6=100
640÷80=8
540÷90=6
240÷4=60
81÷3=27
81÷27=3

答案： 解析：这些题目都是基础的数学运算，包括除法、乘法和加减法。我们可以直接计算。
答案：
$240 ÷ 60 = 4$
$210 ÷ 30 = 7$
$180 ÷ 90 = 2$
$360 ÷ 90 = 4$
$800 ÷ 8 = 100$
$19 × 20 = 380$
$13 × 20 = 260$
$28 × 2 = 56$
$13 × 5 = 65$
$15 × 3 = 45$
$50 × 70 = 3500$
$60 × 50 = 3000$
$400 ÷ 50 = 8$
$22 × 4 = 88$
$50 × 50 = 2500$
$20 × 5 = 100$
$16 × 5 = 80$
$12 × 70 = 840$
$33 × 3 = 99$
$140 - 90 = 50$
$54 + 45 = 99$
$32 + 39 = 71$
$29 + 37 = 66$
$30 - 17 = 13$
$15 × 40 = 600$
$11 × 8 = 88$
$17 × 5 = 85$
$64 ÷ 16 = 4$
$240 ÷ 40 = 6$
$720 ÷ 24 = 30$
$42 ÷ 14 = 3$
$300 ÷ 5 = 60$
$540 ÷ 6 = 90$
$48 + 52 = 100$
$27 + 24 = 51$
$130 - 80 = 50$
$72 - 43 = 29$
$25 × 30 = 750$
$240 ÷ 6 = 40$
$600 ÷ 6 = 100$
$640 ÷ 80 = 8$
$540 ÷ 90 = 6$
$240 ÷ 4 = 60$
$81 ÷ 3 = 27$
$81 ÷ 27 = 3$