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hagic square each row, column and diagonal have the same sum. Check which, follow ing isa magic square., , , , bh) =a +b for the following values of a and b., 21,b=18 (i) a= 118,b = 125, 75,b=84 (iv) a=28,b=11, , rhe sign of >. <or= in the box to make the statements true., , 8) + 4) LJ] @8%)-c4, 3)+7-(19) [ ] 15-8+(€9), , 41+ 1] [ ] 23-41-11, , 24)-(15) [ ] 36+(-52)-(36), +79 +51 [2s 899 + 130 e ae, , tank has steps inside it. A monkey is sitting on the topmost step (i.e., the first, The water level is at the ninth step. ', He jumps 3 steps down and then jumps back 2 steps up., / many jumps will he reach the water level? }, A fier a ce water, he wants to go back. For this, he a ;, ps 4 steps up and then jumps back 2 steps down — f, n every move. In how many jumps will he reach back ~, the top step?, .e number of steps moved down is represented by /, , egative integers and the number of stepsmovedupby § '“/“%, positive integers, represent his moves in part (i) and (ii) my Y, , by completing the following; (a) — 342- = —8, b)4—2+... = 8. In(a) the sum (-8) aicents going, »wn by eight steps. So, what will the sum 8 in (b), , represent?, , 3 Properties OF ADDITION AND SuBTRACTION oF INTHGERS, , 3.1 Closure under Addition, , have learnt that sum of two whole numbers is again a whole number. For example, ms, 24=41 which is again a whole number. We know that, this property is known as the,, pure property for addition of the whole numbers. )