225+475=700 19.3-2.7=16.6

1

2

+

3

4

=

5

4

3.2×0.25-0.25=0.55

1

3

4

÷1.75=1

3

4

×

2

3

=

1

2

5.1÷0.01=510

4

7

×5.6=3.2

8.1-6

1

2

=1.6 4.1+1÷2=4.6 1÷（

2

9

-

1

9

）=9

3

4

÷

2

3

=

9

8

1÷

3

10

=

10

3

3-1÷3=2

2

3

1

14

÷

2

7

=

1

4

（3.5%-0.035）÷2

1

4

=0