1. 2.1

x 0.6

1.26***
2.16
2.26
12.6

2.6.4
x 0.8

4.82
5.12***
6.82
51.2

3.0.89
x 0.65

57.85
5.785
0.05785
0.5785**

4.1.63
x 0.98

0.15974
1.5974***
0.015974
15.974

All your answers are right. :-)

To solve these multiplication problems, you simply need to multiply the given numbers together. Here's how you can do it:

1. 2.1 times 0.6 = 1.26
Explanation: Multiply the decimal numbers 2.1 and 0.6 together to get the product 1.26.

2.6.4 times 0.8 = 5.12
Explanation: Multiply the decimal numbers 6.4 and 0.8 together to get the product 5.12.

3.0.89 times 0.65 = 0.5785
Explanation: Multiply the decimal numbers 0.89 and 0.65 together to get the product 0.5785.

4.1.63 times 0.98 = 1.5974
Explanation: Multiply the decimal numbers 1.63 and 0.98 together to get the product 1.5974.

In each case, the answer with three asterisks (***) is the correct product.