Index laws: multiplying and dividing
The Maths Habit
Write 6 × 6 × 6 × 6 in index form.
64Work out 27.
128Which is bigger: 34 or 43?
34 (81 is bigger than 64)
One grain of rice on the first square of a chessboard, two on the next, then four, doubling each time. How many grains are on the last square?
About 9 million million million
Write out in full
Write out in full
Write out in full
- Base
- The number that is being multiplied.
- Index
- The small number that says how many times to multiply. Also called a power.
23 × 22
Write 24 × 25 as a single power of 2.
Write 53 × 56 as a single power of 5.
Write 24 × 25 as a single power of 2.
Write 82 × 87 as a single power of 8.
Write 47 ÷ 43 as a single power of 4.
Write 65 ÷ 62 as a single power of 6.
Write 47 ÷ 43 as a single power of 4.
Write 28 ÷ 25 as a single power of 2.
Write 24 × 25 as a single power of 2.
Write 35 × 32 as a single power of 3.
Write 47 ÷ 43 as a single power of 4.
Write 75 ÷ 72 as a single power of 7.
Write 47 ÷ 43 as a single power of 4.
Write 68 ÷ 67 as a single power of 6.
Answer sheet
Sam says 23 × 32 = 65. What has he done wrong?
The bases are differentWrite 54 ÷ 54 as a single power of 5. What is it as an ordinary number?
50, which is 1
Write 64 × 65 as a single power.
69Write 98 ÷ 92 as a single power.
96Ben says 56 ÷ 53 = 52. What has he done wrong? Write the right answer.
53