حاصل ضرب های زیر را به دست آورید: $743 \times 200 = \dots$ $800 \times 900 = \dots$ $534 \times 345 = \dots$

1) $301 \times 716 = \dots$

2) $624 \times 209 = \dots$

3) $405 \times 207 = \dots$

1) $2/7 + 3/7 = \dots$

2) $5/7 - 2/7 = \dots$

3) $12/19 - 7/19 = \dots$

4) $2/5 + 3/10 = \dots$

5) $4/7 - 5/14 = \dots$

6) $72 \div 8 = \dots$

7) $42 \div 6 = \dots$

8) $36 \div 4 = \dots$

9) $24 \div 3 = \dots$