Remember: Doubling means twice as many each time. It starts small and grows very fast, one square after another.
Read and answer
Read the story first, then answer.
Sissa and the kingA bored king loved games, so a helper named Sissa brought him chess, played on a board of squares. "Ask for any gift," said the king. Sissa smiled. "I only want a little rice. Put one grain on the first square." Then two grains went on the second square, and each square held double the one before. The king laughed. One grain, two, four, eight, sixteen. The tenth square held five hundred twelve grains, and all ten squares together held one thousand twenty-three, about a handful of rice. But the board had sixty-four squares, so fifty-four were still empty. By the twentieth square the pile would fill a sack, and by the fortieth it would be as big as the palace. The king stopped laughing.
1
Each square holds double the one before. Square 4 holds grains.
2
Which row of numbers doubles each time?
6, 8, 10, 126, 12, 18, 246, 12, 24, 48
3
Doubling means adding two each time.
TrueFalse
4
Look at the bars. Square 7 holds 64 grains. Double that is grains on square 8.
5
All ten squares together held about a handful of rice.
TrueFalse
6
The board has 64 squares. Ten are used, so 64 − 10 = squares are still empty.
Join, order and fix
7
👑Why did the king stop laughing?
The pile kept doubling and grew far too bigSissa asked for goldThe board broke in two
8
Join each square to its grains.
1Square 2
2Square 3
3Square 4
4Square 6
A4 grains
B8 grains
C32 grains
D2 grains
9
Put the story in order, first to last.
Sissa brings the game of chess
The king says, ask for any gift
The king stops laughing
Sissa asks for rice, doubling on each square
10
Fix the mistake: the king says the third square holds 3 grains, because 1, 2, 3.
TrueFalse
11
Fold a sheet of paper in half again and again with a grown-up. Write how many layers you count.
12
Draw the first four squares of the board with 1, 2, 4 and 8 grains.
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