To solve this worksheet, we need to calculate the square of each number listed. Squaring a number means multiplying it by itself.
Here is the step-by-step calculation for each problem:
1.
$13^2$
* Calculation: $13 \times 13$
* Breakdown: $(10 + 3) \times 13 = 130 + 39 = 169$
* Result:
169
2.
$19^2$
* Calculation: $19 \times 19$
* Breakdown: $(20 - 1) \times 19 = 380 - 19 = 361$
* Result:
361
3.
$21^2$
* Calculation: $21 \times 21$
* Breakdown: $(20 + 1) \times 21 = 420 + 21 = 441$
* Result:
441
4.
$30^2$
* Calculation: $30 \times 30$
* Breakdown: $3 \times 3 = 9$, then add two zeros.
* Result:
900
5.
$16^2$
* Calculation: $16 \times 16$
* Breakdown: $(10 + 6) \times 16 = 160 + 96 = 256$
* Result:
256
6.
$27^2$
* Calculation: $27 \times 27$
* Breakdown: $(30 - 3) \times 27 = 810 - 81 = 729$
* Result:
729
7.
$25^2$
* Calculation: $25 \times 25$
* Breakdown: A common trick for numbers ending in 5: multiply the first digit by the next number up ($2 \times 3 = 6$) and put 25 at the end.
* Result:
625
8.
$18^2$
* Calculation: $18 \times 18$
* Breakdown: $(20 - 2) \times 18 = 360 - 36 = 324$
* Result:
324
9.
$32^2$
* Calculation: $32 \times 32$
* Breakdown: $(30 + 2) \times 32 = 960 + 64 = 1024$
* Result:
1024
10.
$41^2$
* Calculation: $41 \times 41$
* Breakdown: $(40 + 1) \times 41 = 1640 + 41 = 1681$
* Result:
1681
Final Answer:
1. 169
2. 361
3. 441
4. 900
5. 256
6. 729
7. 625
8. 324
9. 1024
10. 1681
Parent Tip: Review the logic above to help your child master the concept of squared worksheet.
