11) $7.7 \times 9.1$
12) $3.2 \times 2.1$
13) $72.5 \times 9.9$
14) $77.7 \times 2.3$
15) $641.1 \times 8.9$
16) $8.92 \times 8.34$

Question

Accepted Answer

### 11) $ 7.7 \times 9.1 $
# Explanation:
## Step1: Multiply as whole numbers
$ 77 \times 91 = 7007 $
## Step2: Count decimal places
Total decimal places: $ 1 + 1 = 2 $
## Step3: Place decimal
$ 7007 \div 100 = 70.07 $
# Answer:
$ 70.07 $

### 12) $ 3.2 \times 2.1 $
# Explanation:
## Step1: Multiply as whole numbers
$ 32 \times 21 = 672 $
## Step2: Count decimal places
Total decimal places: $ 1 + 1 = 2 $
## Step3: Place decimal
$ 672 \div 100 = 6.72 $
# Answer:
$ 6.72 $

### 13) $ 72.5 \times 9.9 $
# Explanation:
## Step1: Rewrite $ 9.9 $ as $ 10 - 0.1 $
$ 72.5 \times (10 - 0.1) $
## Step2: Distribute multiplication
$ 72.5 \times 10 - 72.5 \times 0.1 = 725 - 7.25 $
## Step3: Subtract
$ 725 - 7.25 = 717.75 $
# Answer:
$ 717.75 $

### 14) $ 77.7 \times 2.3 $
# Explanation:
## Step1: Multiply as whole numbers
$ 777 \times 23 = 17871 $
## Step2: Count decimal places
Total decimal places: $ 1 + 1 = 2 $
## Step3: Place decimal
$ 17871 \div 100 = 178.71 $
# Answer:
$ 178.71 $

### 15) $ 641.1 \times 8.9 $
# Explanation:
## Step1: Multiply as whole numbers
$ 6411 \times 89 = 570579 $
## Step2: Count decimal places
Total decimal places: $ 1 + 1 = 2 $
## Step3: Place decimal
$ 570579 \div 100 = 5705.79 $
# Answer:
$ 5705.79 $

### 16) $ 8.92 \times 8.34 $
# Explanation:
## Step1: Multiply as whole numbers
$ 892 \times 834 = 743928 $
## Step2: Count decimal places
Total decimal places: $ 2 + 2 = 4 $
## Step3: Place decimal
$ 743928 \div 10000 = 74.3928 $
# Answer:
$ 74.3928 $

Sovi.AI - AI Math Tutor

QUESTION IMAGE

Question

Explanation:

11) \( 7.7 \times 9.1 \)

Step1: Multiply as whole numbers

Step2: Count decimal places

Step3: Place decimal

Step1: Multiply as whole numbers

Step2: Count decimal places

Step3: Place decimal

Step1: Rewrite \( 9.9 \) as \( 10 - 0.1 \)

Step2: Distribute multiplication

Step3: Subtract

Answer:

12) \( 3.2 \times 2.1 \)