maths addition and subtraction

john has 50 apples . he gave 10 to his sister , 21 to his mother and 3 to his friend how much is left with john ?

• 16

• 19

• 20

• 15

Alisa has 80 chocolates in her collection. Then she got 20 more from her father , 12 from her mother and 3 more from her sister . how many chocolates does she have in all ?

• 112

• 103

• 119

• 115

51 +71-30

• 95

• 92

• 89

• 122

20 + ? = 72

• 92

• 63

• 52

• 50

123 - ? = 54

• 72

• 69

• 41

• 77