Long multiplication

Use the formal written method to multiply 2- and 3-digit numbers by 2-digit numbers

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Try each question. If you're stuck, leave it and come back. The answer key is on the last page.

1
What is 23 × 12? A) 256 B) 276 C) 286 D) 296
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2
Calculate: 14 × 21 = ___ 14 × 21 = ___
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3
Is this statement true or false? 32 × 11 = 352. A) True B) False
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4
What is 15 × 13? A) 165 B) 175 C) 185 D) 195
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5
Calculate: 24 × 36 = ___ 24 × 36 = ___
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6
What is 47 × 23? A) 1071 B) 1081 C) 1091 D) 1181
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7
Put the steps in order for calculating 35 × 24 by long multiplication. Put these in order: Multiply 35 by 4 (the ones digit) to get 140, Multiply 35 by 20 (the tens digit) to get 700, Add 140 and 700, Write the answer 840
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8
Calculate: 124 × 23 = ___ 124 × 23 = ___
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9
What is 213 × 14? A) 2882 B) 2972 C) 2982 D) 3082
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10
Is this statement true or false? 152 × 25 = 3800. A) True B) False
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Answer key

Long multiplication · for parents and teachers

1
276
23 × 12 = 230 + 46 = 276.
2
294
14 × 21 = 280 + 14 = 294.
3
True
32 × 11 = 320 + 32 = 352. The statement is true.
4
195
15 × 13 = 150 + 45 = 195.
5
864
24 × 36 = 720 + 144 = 864.
6
1081
47 × 23 = 940 + 141 = 1081.
7
Multiply 35 by 4 (the ones digit) to get 140, Multiply 35 by 20 (the tens digit) to get 700, Add 140 and 700, Write the answer 840
35 × 4 = 140, 35 × 20 = 700, 140 + 700 = 840. So 35 × 24 = 840.
8
2852
124 × 23 = 2480 + 372 = 2852.
9
2982
213 × 14 = 2130 + 852 = 2982.
10
True
152 × 25 = 3040 + 760 = 3800. The statement is true.