5/10 Multiplication using a formal method 5/10 Division using a formal method By a ONE-DIGIT number By a ONE-DIGIT number e.g. 3561 x 7 COLUMN METHOD e.g. 9138 ÷ 6 1 5 2 6 3561 6 )9311318 7x 24927 By a TWO-DIGIT number 3 4 e.g. 4928 ÷ 32 SAME METHOD e.g. 3561 x 7 GRID METHOD (Except write down some of your tables down first) 32 3000 500 60 7 0 1 5 4 64 7 21000 3500 420 49 32 449172 128 96 128 21000 + 3500 + 420 + 49 = 24927 160 4928 ÷ 32 = 154 By a TWO-DIGIT number e.g. 4928 ÷ 32 ALTERNATE METHOD Divide e.g. 152 x 34 COLUMN METHOD Multiply 152 Subtract 34x Bring down - Make a new number 608 (x4) Divide ... 4560 (x30) 0 1 5 4 5168 32 4 9 2 8 -3 2 1 7 2 e.g. 152 x 34 GRID METHOD -1 6 0 1 2 8 100 50 2 -1 2 8 30 3000 1500 60 0 0 0 4928 ÷ 32 = 154 4 400 200 8 152 x 34 = 3400 + 1700 + 68 = 5168
5/10 Multiplication using a formal method By a ONE-DIGIT number e.g. 3561 x 7 COLUMN METHOD 3561 7x 24927 3 4 e.g. 3561 x 7 GRID METHOD 3000 500 60 7 7 21000 3500 420 49 21000 + 3500 + 420 + 49 = 24927 By a TWO-DIGIT number e.g. 152 x 34 COLUMN METHOD 152 34x 608 (x4) 4560 (x30) 5168 e.g. 152 x 34 GRID METHOD 100 50 2 30 3000 1500 60 4 400 200 8 152 x 34 = 3400 + 1700 + 68 = 5168 5/10 Division using a formal method By a ONE-DIGIT number e.g. 9138 ÷ 6 1 5 2 6 6 )9311318 By a TWO-DIGIT number e.g. 4928 ÷ 32 SAME METHOD (Except write down some of your tables down first) 32 64 0 1 5 4 96 32 449172 128 128 160 4928 ÷ 32 = 154 e.g. 4928 ÷ 32 ALTERNATE METHOD Divide Multiply Subtract Bring down - Make a new number Divide ... 0 1 5 4 32 4 9 2 8 -3 2 1 7 2 -1 6 0 1 2 8 -1 2 8 0 0 0 4928 ÷ 32 = 154