23.11.15 LI: Can I multiply a two digit number by another two digit number using the Grid Method? Date automatically changes to today’s date.

Can you work this out by using the grid method? 73 x 58=

Did you get it right? X 70 3 50 3500 150 8 560 24 3650 + 584 4234

If no, here is a recap..! 25 x 35= 20 + 5 30 + 5 X 20 5 30

If no, here is a recap..! 25 x 35= X 20 5 30 600 6 150 15 100 10 25

What next? 25 x 35= X 20 5 30 600 150 100 25 6 1 5 +   2 8 7 5

Try this one… Use the Grid Method of multiplication to work out this question… 71 x 43 =

71 x 43 = X 70 1 40 3 2800 28 40 210 21 3

71 x 43 = 2 8   1 4 + 3 (2000 + 0) (800 + 200) 5 (10 + 40) (3 + 0) X 70 1 40 3 28 2800 40 210 21 3

Challenge 1 Challenge 2 Challenge 3 Challenge 3 Contd. L.I. Can I multiply a two digit number by another two digit number using the Grid Method? Challenge 1   Challenge 2 Challenge 3 Q1 ) 92 x 50 = 139 155 497 Q2 18 98 87 166 119 517 Q3 17 82 185 101 227 Q4 58 39 66 158 109 141 Q5 53 44 46 136 122 642 Q6 22 70 28 102 114 363 Q7 51 32 93 165 180 301 Q8 43 71 99 151 169 316 Q9 68 64 191 578 Q10 21 117 116 197 Q11 157 367 Challenge 3 Contd. Q12 188 176 A baker bakes twenty doughnuts per day, how many does he bake in a 2weeks? Q13 175 258 Sam bought 138 rolls of paper. Each roll was 34m long. How long is it altogether? Q14 121 417 Tom collected 57 stamps a week for 2 years. How many stamps did he collect? Q15 159 378 Niamh eats 246 apples a year. How many does she eat in twelve years? Q16 150 533 A Garden is 20m wide and its length is 187m. What is its total area? Q17 132 126 Mr Senior swims 48 lengths a week, how many lengths does he swim a year? Q18 120 538 If Fanta is packed in boxes of 67, how many cans will there be in 25 boxes? Q19 145 601 Mrs Haddleton runs 12 laps of the field a week. How many laps in 3.5 years? Q20 152 922

Answer Key Section A Section B Section C Section D   Section B Section C Q1 ) 92 x 50 = 4600 139 12788 155 497 77035 Q2 18 98 1764 87 166 14442 119 517 61523 Q3 17 1479 82 185 15170 101 227 22927 Q4 58 39 2262 66 158 10428 109 141 15369 Q5 53 44 2332 46 136 6256 122 642 78324 Q6 22 70 1540 28 102 2856 114 363 41382 Q7 51 32 1632 93 165 15345 180 301 54180 Q8 43 71 3053 99 151 14949 169 316 53404 Q9 68 6324 64 191 12224 578 63002 Q10 21 1113 117 2457 116 197 22852 Q11 157 367 57619 Section D Q12 188 176 33088 20 x 14 = 280 Q13 175 258 45150 138 x 34 = 4692 Q14 121 417 50457 57 x (52 x 2) = 5928 Q15 159 378 60102 246 x 12 = 2952 Q16 150 533 79950 187 x 20 = 3740 Q17 132 126 16632 48 x 52 = 2496 Q18 120 538 64560 67 x 25 = 1675 Q19 145 601 87145 12 x 182 = 2184 Q20 152 922 140144

Can you multiply three digit numbers? How would you set this one out? 124 x 45 =

124 x 45 = 4   8 1 6 5 + 2 (4000 + 0) (800+100+100+500) (60+20) X 100 20 4 40 4000 800 160 5 500

Assessment Using the Grid Method of multiplication, work out the answer to these: 46 x 25 560 x 28 245 x 152

Assessment Answers Q1 40 6 20 800 120 5 200 30 800 120 200 30 1150 Q2 500 60 20 10000 1200 8 4000 480 10000 1200 4000 480 15680 20000 4000 500 10000 2000 250 400 80 10 37240 Q3 200 40 5 100 20000 4000 500 50 10000 2000 250 2 400 80 10