MENTAL MATHS: Round the following numbers off:

Here are the solutions to the problems.

MENTAL MATHS: Round the following numbers off:

Note: For the "Nearest thousands" column, it is assumed that "thousands" is a typo and should be "thousandth" given the context of decimal fractions. If it literally meant "Nearest thousands" (whole number), the answers would be 0, 0, and 2000 respectively.

Number	Nearest Unit	Nearest tenth	Nearest hundredth	Nearest thousandth
64.45369	$\boxed{64}$	$\boxed{64.5}$	$\boxed{64.45}$	$\boxed{64.454}$
9.8472	$\boxed{10}$	$\boxed{9.8}$	$\boxed{9.85}$	$\boxed{9.847}$
2345.9991	$\boxed{2346}$	$\boxed{2346.0}$	$\boxed{2346.00}$	$\boxed{2345.999}$

Activity 1: Complete the following multiplication table.

Number	multiply by 1	multiply by 10	multiply by 100
5	$\boxed{5}$	$\boxed{50}$	$\boxed{500}$
5.3	$\boxed{5.3}$	$\boxed{53}$	$\boxed{530}$
0.5	$\boxed{0.5}$	$\boxed{5}$	$\boxed{50}$
3.75	$\boxed{3.75}$	$\boxed{37.5}$	$\boxed{375}$
45.5	$\boxed{45.5}$	$\boxed{455}$	$\boxed{4550}$
0.2	$\boxed{0.2}$	$\boxed{2}$	$\boxed{20}$

Activity 2: a) Complete the following multiplication table.

Number	multiply by 3	multiply by 5	multiply by 10
3.12	$\boxed{9.36}$	$\boxed{15.60}$	$\boxed{31.2}$
0.5	$\boxed{1.5}$	$\boxed{2.5}$	$\boxed{5}$
3.72	$\boxed{11.16}$	$\boxed{18.60}$	$\boxed{37.2}$
15.25	$\boxed{45.75}$	$\boxed{76.25}$	$\boxed{152.5}$
0.2	$\boxed{0.6}$	$\boxed{1}$	$\boxed{2}$

Activity 2: b)
The problems for this section are not visible in the image provided.