3.6 Number block  (Page 2/3)

It might help them to draw the diagrams.

The decision to make use of carried numbers is left to the educator.

First supply paper shapes for dividing into tens, so that the learners may discover for themselves that tenths, like thirds and fifths, have to be calculated and measured. It is not simply a matter of folding and folding again as in the case of a ½ and a ¼ .

Guide them to discover that they, by first obtaining fifths, can divide each fifth down the middle to obtain tenths.

Discuss symmetrical shapes with the learners. Let them identify symmetrical objects in the classroom. They should complete the drawing after this exercise.

Leaner section

Content

Activity: number block [lo 1.1, lo 1.3, lo 1.4, lo 1.5, lo 1.8, lo 1.9, lo 1.10]

• Which numbers do these diagrams represent?

• Here we have 9 hundreds, 9 tens and 9 units. Add 1 more unit to the last ten.
• Group the ten and then the hundred.

Now there are hundreds. It is equal to ________________________

• Complete the diagrams:

• Complete the number block:

• When you move horizontally across the number block, you count in tens.

780 790 ________ ________ ________ _______ _______ _______ 860

920 930 ________ ________ ________ _______ _______ _______ 1000

950 940 ________ ________ ________ _______ _______ _______ 870

860 850 ________ ________ ________ _______ _______ _______ 780

• When you move vertically down the number block, you count in hundreds.

200 300 ________ ________ ________ _______ _______ _______ 1000

120 220 ________ ________ ________ _______ _______ _______ 920

9650 860 ________ ________ ________ _______ _______ _______ 160

• Complete:

• Write down all the 3-digit numbers that you can make with the numbers 3, 8 and 9:
• In which number does the 3 have the highest place value?_________________
• In which of these numbers does the 9 have the lowest place value? _______________________________________________________________
• Arrange the numbers from the most to the least:

_______________________________________________________________

• Fill in<,>of = :

650 + 30 ...... 630 + 50

500 + 1 62 ...... 500 + 1 26

348 + 1 00 ...... 200 + 250

730 - 1 1 0 ...... 720 - 1 00

852 - 400 ...... 852 - 452

900 - 500 ...... 900 - 400

• Give the even numbers to the elephant and the uneven numbers to the lion:

1 1 7 426 853 555 851 504 912 963

404 765 299 510 400 889 668 1000

• What is the difference in mass between the lion and the bear?_____________
• What is the sum of the mass of the lion and the bear? ____________________
• Which animal has a greater mass than the bear? __________________
• Which mammal has a smaller mass than the lion? ______________________

• Double all the numbers on the tortoise’s shell.

• Halve all these numbers.

• Write the number that comes 4 places before:

837:_____ 964:_____ 850:_____ 900:_____

802:_____ 903:_____ 892:_____ 1000:_____

• Write the number that comes 6 places after:

833:_____ 952:_____ 830:_____ 990:_____

824:_____ 974:_____ 899:_____ 993:_____

• Write the number names:

319: _________________________________________________________________