Convert to the same units then the addition can be done:
1 mm = 1/1000 m
→ 2.2 m + 900 mm = 2.2 m + 900 × 1/1000 m = 2.2 m + 0.9 m = 3.1 m
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a metre=100 cm half a metre=(.5)*(100)=50 cm total length=previous length+half a length = 78 cm +50 cm =128 cm or 1.28 metre
Nope. 1 metre square is a square one metre on each side, total area 1m². 1 square metre is any area (eg a triangle) whose total area is 1m²
It is the total length "outline" of a figure. For example, the total length of the outline of a square, its perimeter, is the total length of the four sides of the square.
1 square metre is the metric unit of measurement for an area. The area may be of any flat shape: a long thin strip, circle, triangle, the inside of a closed wriggly curve. But the total area covered by it must be equal to that of a square whose sides are 1 metre long.
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