ICT PROJECT

PREFACE DEAR FRIENDS,                                                                 WE DID WITH SHORT CUTS, TRICKS IN SOLVING  ...

MULTIPLICATION BY 9, 99, 999, ETC. There is another way to multiply fast by 9 that has an analogue for multiplication by 99, 999 an...

MULTIPLIPLY, THEN SUBTRACT. When multiplying by 9, multiply by 10 instead, and then subtract the other number. For example, 23×9 ...

FASTER ADDITION. Addition is often faster in two steps instead of one. For example, 487 + 38 = (487 + 13) + (38 - 13) = 500 + 2...

FASTER SUBTRACTION. Subtraction is often faster in two steps instead of one. For example, 427 - 38 = (427 - 27) - (38 - 27) =...