Multiply by multiples of 10 and 100
Name: _____________________ Date: __________
Show your thinking with numbers, words, or a drawing.
1. 50 × 7 = ?
2. 8 × 60 = ?
3. 50 × 9 = ?
4. 5 × 80 = ?
5. 2 × 40 = ?
Answer key · Multiply by multiples of 10 and 100
1. 350
Basic fact: 5 × 7 = 35.
50 and 7 have 1 zero altogether, so the answer is 35 with 1 zero on the end.
50 × 7 = 350.
2. 480
Basic fact: 8 × 6 = 48.
8 and 60 have 1 zero altogether, so the answer is 48 with 1 zero on the end.
8 × 60 = 480.
3. 450
Basic fact: 5 × 9 = 45.
50 and 9 have 1 zero altogether, so the answer is 45 with 1 zero on the end.
50 × 9 = 450.
4. 400
Basic fact: 5 × 8 = 40.
5 and 80 have 1 zero altogether, so the answer is 40 with 1 zero on the end.
5 × 80 = 400.
5. 80
Basic fact: 2 × 4 = 8.
2 and 40 have 1 zero altogether, so the answer is 8 with 1 zero on the end.
2 × 40 = 80.
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.