Long multiplication
Name: _____________________ Date: __________
Show your thinking with numbers, words, or a drawing.
1. 31 × 14 = ?
2. 36 × 16 = ?
3. 39 × 14 = ?
4. 24 × 18 = ?
5. 14 × 13 = ?
Answer key · Long multiplication
1. 434
Split 14 into 10 + 4.
31 × 4 = 124.
31 × 10 = 310 (remember the second row is a multiple of ten).
124 + 310 = 434.
2. 576
Split 16 into 10 + 6.
36 × 6 = 216.
36 × 10 = 360 (remember the second row is a multiple of ten).
216 + 360 = 576.
3. 546
Split 14 into 10 + 4.
39 × 4 = 156.
39 × 10 = 390 (remember the second row is a multiple of ten).
156 + 390 = 546.
4. 432
Split 18 into 10 + 8.
24 × 8 = 192.
24 × 10 = 240 (remember the second row is a multiple of ten).
192 + 240 = 432.
5. 182
Split 13 into 10 + 3.
14 × 3 = 42.
14 × 10 = 140 (remember the second row is a multiple of ten).
42 + 140 = 182.
Try it together
Choose a question from the printable. Use objects or a drawing to show your thinking, then explain your method to someone at home.