:

5 +. = 9

. + 40 = 90

500 + 400 =.

.. + 7 = 15

80 + 70 =.

800 + = 1500

(1)

(2)

: . .

2 + 5 =.. 20 + 50 =.. 200 + 50 =..

8 + 4 =.. 80 + 40 =. 800 + 40 =..

(2)

(1)

+9=23........

(2)

(1)

5 +=8

: .

: .

48 + 37 =..

(3)

31 + 52 =..

(1)

35 + 60 =..

(2)

: .

10

: ................................ ( )

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