Multiplication practice worksheet with nine problems on a grid.

Here are the solutions for the multiplication problems on the worksheet. I have worked through each one step-by-step to ensure accuracy.

1. $234 \times 12$
* First, multiply $234$ by $2$: $234 \times 2 = 468$
* Next, multiply $234$ by $10$: $234 \times 10 = 2340$
* Add them together: $468 + 2340 = 2808$

2. $432 \times 21$
* First, multiply $432$ by $1$: $432 \times 1 = 432$
* Next, multiply $432$ by $20$: $432 \times 20 = 8640$
* Add them together: $432 + 8640 = 9072$

3. $324 \times 11$
* First, multiply $324$ by $1$: $324 \times 1 = 324$
* Next, multiply $324$ by $10$: $324 \times 10 = 3240$
* Add them together: $324 + 3240 = 3564$

4. $622 \times 31$
* First, multiply $622$ by $1$: $622 \times 1 = 622$
* Next, multiply $622$ by $30$: $622 \times 30 = 18660$
* Add them together: $622 + 18660 = 19282$

5. $135 \times 21$
* First, multiply $135$ by $1$: $135 \times 1 = 135$
* Next, multiply $135$ by $20$: $135 \times 20 = 2700$
* Add them together: $135 + 2700 = 2835$

6. $531 \times 22$
* First, multiply $531$ by $2$: $531 \times 2 = 1062$
* Next, multiply $531$ by $20$: $531 \times 20 = 10620$
* Add them together: $1062 + 10620 = 11682$

7. $721 \times 13$
* First, multiply $721$ by $3$: $721 \times 3 = 2163$
* Next, multiply $721$ by $10$: $721 \times 10 = 7210$
* Add them together: $2163 + 7210 = 9373$

8. $421 \times 31$
* First, multiply $421$ by $1$: $421 \times 1 = 421$
* Next, multiply $421$ by $30$: $421 \times 30 = 12630$
* Add them together: $421 + 12630 = 13051$

9. $231 \times 32$
* First, multiply $231$ by $2$: $231 \times 2 = 462$
* Next, multiply $231$ by $30$: $231 \times 30 = 6930$
* Add them together: $462 + 6930 = 7392$

Final Answer:
The answers for the multiplication problems are:
1. 2,808
2. 9,072
3. 3,564
4. 19,282
5. 2,835
6. 11,682
7. 9,373
8. 13,051
9. 7,392