The standard way to multiply
Answers are for parents and teachers.
1
Multiply 63 × 47.
63 × 7 = 441 and 63 × 40 = 2,520. Sum: 2,961.
2
Multiply 4,568 × 23.
4,568 × 3 = 13,704 and 4,568 × 20 = 91,360. Sum: 105,064.
3
Multiply 7,005 × 36.
7,005 × 6 = 42,030 and 7,005 × 30 = 210,150. Sum: 252,180.
4
A market sells 275 kg of tomatoes every day. How many kg is that in 30 days? How much money is that at 9 LE per kg?
275 × 30 = 8,250 kg. 8,250 × 9 = 74,250 LE.
5
Mina writes 45 × 36 = 270 + 135 = 405. Find her mistake and the right answer.
She forgot that the 3 is worth 30. The second row should be 45 × 30 = 1,350. Right answer: 270 + 1,350 = 1,620.