300×7=

600+240=

18×4=

=

=1

=

498-206≈300

215+ 387≈600

7.3+1.7=

7.51+4.9=

4.7+3.8=

7+3.8=

5.6+3=

5.6+0.4=

8.5-2.9=

2-0.01=

4.2-3.5=

4.8-4=

7.6+2.5=

1.74+3.2=

3.8+4.02=

6.3+2.2=

6.26-3.6=

3.42+0.48=

9.37-6.5=

3.65+1.35=

1.25+0.8=

4.04+3.5=

1.76+2.8=

4.8-4.3=

8.26+7.2=

0.24+5.2=

0.8+0.02=

6.5-3.9=

4.4-3.6=

4.6＋3=

4.4-3.9=

0.89+2.73=

6.8+7.6=

5.8-2.9=

9.2-2.9=

5.3-3.4=

6.8＋6.7=

5.7+0.5=

5.8+14.7=

2.1-1.4=

8.5+2.6=

6.4-5.9=

7.5-3.9=

7.5-5.8=

1.8+7.7=

4.7+8.6=

1.5-0.6=

1.7+8.9=

5.6-3.8=

9.1+2.4=

3.7-1.8=

6.9-5.6=

6.9+6.5=

8.8-5.9=

9.5-4.9=

7.6-5.8=

1.8+9.8=

7.5-5.7=

2.4-0.9=

9.7-4.9=

2.9+3.2=

4.8+9.6=