Risadij7
Risadij7
19-05-2015
Mathematics
contestada
what is the sum of the counting numbers 1 - 40
Respuesta :
surekha
surekha
19-05-2015
820. there is a shortcut which can be used when adding consecutive numbers regardless of how big it is. it can also be done manually though
Answer Link
Trim
Trim
19-05-2015
Simply it as follows:
1 + 39 = 40
2 + 38 = 40 etc
18 + 22 = 40
19 + 21 = 40
There are 19 of these plus 40 itself . . .therefore 20 of them
20 x 40 = 800
And finally the last number not used, 20
Therefore 800 + 20 = 820
Answer Link
VER TODAS LAS RESPUESTAS ( 96+ )
ACCESS MORE
ACCESS MORE
ACCESS MORE
ACCESS MORE
Otras preguntas
-4d -3 + 5d4 - 8d4 + 7
Critique this: Substances are made of two or more types of elements
the difference of a number and eight is four. Find the number.
WILL GIVE BRAINLIESTParallel structure is the use of choppy, uneven sentences to cause stress for the reader the use of phrases and clauses that repeat the same
Single nucleotide polymorphisms (SNPs), insertions, and deletions (together known as indels), as well as significant chromosome configurations
How many moles of ethylenediamine (H2NCH2CH2NH2) are contained in 10.4 ml of 25% ethylenediamine solutions? The density of the solution is 0.950 g/mL.
At what point after an activity has been initiated does the body switch energy sources from the immediate energy system to the anaerobic energy system?.
Density Altitude a. Pressure differential with respect to Pressure at Sea Level b. Physical distance between aircraft and reference (e.g. Sea Level) c. Differen
On his return to hygelac's kingdom, what promises does hrothgar make to beowulf after beowulf promised hrothgar to always be at hand and serve the king at arms?
What would decrease the gravitational pull between the sun and Earth?(1 point) Responses a. if the sun was twice its size if the sun was twice its size b. if E
