Question
$(-22) + 21 + (-22) + 21 + ....... + 20$ terms is equal to .......
✓
Answer
$\because$ $(-22) + 21 = -(22 - 21) = -1$
$\therefore$ $(-22) + 21 + (-22) + 21 + ... + 20$
terms $= (-1) + (-1) + (-1) + ... + 10$
terms $= 10 × (-1) = -10$
$\therefore$ $(-22) + 21 + (-22) + 21 + ... + 20$
terms $= (-1) + (-1) + (-1) + ... + 10$
terms $= 10 × (-1) = -10$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Between which two whole numbers on the number line are the given numbers? Which one is nearer the number? $4.9$
→Write the fraction representing the shaded portion.
Write all the terms of the algebraic expressions:$9 x^3-5 z^4+7 x^3 y-x y z$
→Fill in the blanks to make the following a true statement: $4567 \times 1 =$ __
→In the questions $66$ to $71$, fill in the blanks using $‘>’, ‘<’$ or $‘=’: 3.25 ... 3.4$
→Fill in the blanks to make the following statement true: _____ edges of a cube (or cuboid) meet at each of its vertices.
Which number in the following pairs is smaller?
-3, 12
-3, 12
Fill in the balanks:
The diameters of a circle are __________.
Write the following using numbers, literals and signs of basic operations: $2$ less than the quotient of $x$ by $y.$
→Round off the following number to nearest tens: $998$
→