Question

① $\frac{1}{4}+\frac{1}{4}$
② $\frac{2}{9}+\frac{1}{9}$
③ $\frac{3}{17}+\frac{1}{17}$
④ $\frac{3}{10}+\frac{3}{10}$
multiply
$32.24×2.7$

Explanation:

Step1: Ignore handwritten top entries, focus on $32.24 \times 2.7$

Treat as integer multiplication first: $3224 \times 27$

Step2: Calculate integer product

$3224 \times 27 = 3224 \times (20+7) = 3224\times20 + 3224\times7 = 64480 + 22568 = 87048$

Step3: Count total decimal places

$32.24$ has 2 decimals, $2.7$ has 1 decimal; total = $2+1=3$

Step4: Place decimal in product

$\frac{87048}{1000} = 87.048$

Answer:

$87.048$