數學問題 小數除法

1. 17.7÷4
=(16+1.7)÷4
=(16÷4)+(1.7÷4)
=4+0.425
=4.425
=4.43(答案取至數點後兩個位)

2. 70÷8
=(64+6)÷8
=(64÷8)+(6÷8)
=8+0.75
=8.75(答案取至數點後兩個位)

3. 63.9÷12
=(60+3.9)÷12
=(60÷12)+(3.9÷12)
=5+0.325
=5.325
=5.33(答案取至數點後兩個位)

4. 53÷11
=(44+9)÷11
=(44÷11)+(9÷11)
=4+0.81818182
=4.82(答案取至數點後兩個位)

5. 452÷25
=(450+2)÷25
=(450÷25)+(2÷25)
=18+0.08
=18.08(答案取至數點後兩個位)

6. 196÷9
=(189+7)÷9
=(189÷9)+(7÷9)
=21+0.7778
=21.78(答案取至數點後兩個位)

7. 380÷16
=(368+12)÷16
=(368÷16)+(12÷16)
=23+0.75
=23.75(答案取至數點後兩個位)

8. 239÷14
=(238+1)÷14
=(238÷14)+(1÷14)
=17+0.07142857
=17.07142857
=17.08(答案取至數點後兩個位)

9. 24.5÷7
=(21+3.5)÷7
=(21÷7)+(3.5÷7)
=3+0.5
=3.5(答案取至數點後兩個位)

Hope I can help you ^v^

17.7÷4=4.43
70÷8=8.75
63.9÷12=5.33
53÷11=4.82
452÷25=18.08
196÷9=21.78
380÷16=23.75
239÷14=17.07
24.5÷7=3.5

17.7÷4
=4.43

70÷8
=8.75

63.9÷12
=5.33

53÷11
=4.82

452÷25
=18.08

196÷9
=21.78

380÷16
=23.75

239÷14
=17.07

24.5÷7
=3.5

17.7÷4
= 4 + 1.7÷4
= 4 + 0.4 + 0.1÷4
= 4 + 0.4 + 0.025
= 4.43
70÷8
= 8 + 6÷8
= 8 + 0.7 + 0.4÷8
= 8 + 0.7 + 0.05
= 8.75
63.9÷12
= 5 + 3.9÷12
= 5 + 0.3 + 0.3÷12
= 5 + 0.3 + 0.02 + 0.06÷12
= 5 + 0.3 + 0.02 + 0.005
= 5.33
53÷11
= 4 + 9÷11
= 4 + 0.8 + 0.2÷11
= 4 + 0.8 + 0.01 + 0.09÷11
= 4 + 0.8 + 0.01 + 0.008 + 0.0001 + ...
= 4.82
452÷25
= 18 + 2÷25
= 18 + 0.08
= 18.08
196÷9
= 21 + 7÷9
= 21 + 0.7 + 0.7÷9
= 21 + 0.7 + 0.07 + 0.007 + ...
= 21.78
380÷16
= 23 + 12÷16
= 23 + 0.75
= 23.75
239÷14
= 17 + 1÷14
= 17 + 0.07 + 0.02÷14
= 17.07
24.5÷7
= 3 + 3.5÷7
= 3 + 0.5
= 3.5