Question

直接寫出得數： 1 6 + 1 5 =	1 2 - 1 5 =	0.2+1.8=	0.9-0.27=
1.9×4×0.5=	4 5 - 4 5 × 1 4 =	5 8 + 4 9 + 5 9 + 3 8 =	12.56÷3.14=

Answer 1

分析：本題根據分數與小數的加法、減法、乘法、除法的運算法則計算即可．

解答：解：①

1

6

+

1

5

=

11

30

            ③

1

2

-

1

5

=

3

10

                ⑤0.2+1.8=2                ⑦0.9-0.27=0.63
②1.9×4×0.5=3.8          ④

4

5

-

4

5

×

1

4

=

3

5

             ⑥

5

8

+

4

9

+

5

9

+

3

8

=2             ⑧12.56÷3.14=4

點評：完成此類題目要根據運算法則認真分析式中數據，然后快速準確得出答案．