Question

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Answer 1

D)

62 + 10 = 72

72 . 5 = 360

360 - 100 = 260

260 + 40 = 300

a)
   62
+ 10
   72

b)

   7 2
x    5
3 6 0

c)
 360
-100
 260

d)
260
+40
300
____________________________
4)

a)
2.5 x 2 + 15  = 10 x 2 + 15 = 20 + 15 = 35

2 x 5 = 10
10 x 2 = 20
20 + 15 = 35

b)
3 . 7 x 4 - 8 = 21 x 4 - 8 = 84 - 8 = 76

3 x 7 = 21
21 x 4 = 84
84 - 8 = 76

c)
4 . 6 x 5 + 20 = 24 x 5 + 20 = 120 + 20 = 140

4 x 6 = 24
24 x 5 = 120
120 + 20 = 140