Homework 1.


a) H T U 485


– 148


2. a) Th H T U 6020


– 1091


b) H T U 249


– 68


b) Th H T U 1373


– 629


c) H T U 600


– 285


d) H T U 133


– 101


c) Th H T U 5700


– 1982


3. Complete the following in your copy. a) 3007 – 2669


Estimate a) 2467 – 1025 = Estimate c) 2682 – 1195 = Estimate e) 9077 – 2770 = Answer f) 7298 – 2065 =


5. Distance from Dublin to Paris 1050km Distance from Knock to Athens 3040km Distance from Cork to Berlin 1487km Distance between Kerry and London 638km


a) What is the difference in distance between Dublin and Paris, and Kerry and London?


b) How much longer is a fl ight from Galway to Athens than a fl ight from Cork to Berlin?


c) How much further would a fl ight from Cork to Berlin have to travel than a fl ight from Kerry to London?


Recap


• I can subtract bigger numbers. • I know how to rename before subtracting. • I know how to estimate before subtracting. • I can use my subtraction skills to solve word problems.


Subtraction 27 Answer d) 9305 – 6735 = Estimate Answer


e) H T U 306


– 138


d) Th H T U 3912


– 1957


f) H T U 520


– 334


e) Th H T U 4441


– 2849


g) H T U 927


– 719


f) Th H T U 2701 99


–


h) H T U 861


– 199


g) Th H T U 7194


– 4509


b) 3465 – 1727 Answer b) 7052 – 6179 = Estimate Answer


c) 6029 – 5766


d) 4643 – 4394


4. Estimate the answer fi rst and then fi nd out the exact answer. Check your answer on your calculator.


Estimate Answer


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