4 X 10 + 4 X 9 = ....................................................

5 X 10 + 5 X 8 = ....................................................

7 X 20 + 7 X 4 = ....................................................

6 X 40 + 6 X 5 = ....................................................

 

a	b	c	a X b	a X c	a X b X c	a X b + a X c
4	7	5
6	8	2

3. dopolni; primer: 9 X 8 = 72 
 

72    9 8

2  13

15   6

40 10

200       2

4. Calculate.

5. najdi manjkajoče številke
 

1 * * 8 + * 5 6 *  ______ 9 7 9 0

3 * 6 * + * 5 * 7 _______ 7 8 9 2

* 5 5 * + 6 * * 9 ______  8 8 7 1

* * 2 7 + 6 4 * * _______ 9 7 5 2

6. izračunaj.

24 + 15 - 9 + 35 - 15 + 40 = .......

40 - 20 + 30 - 25 + 0 + 15 = .......