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How to do the questions 1 and 2 on page 22 of the fourth grade mathematics in primary school?
Puppy+piggy =70, puppy+duckling =55, duckling+piggy =65

Puppy+piggy+puppy+duckling+duckling+piggy

=70+55+65

= 190

(Puppy+Duckling+Piglet)+(Puppy+Duckling+Piglet) = 190

Puppy+Duckling+Piggy =95

Puppy =95- (Duckling+Piggy)

=95-65=30

Duckling =95- (puppy+pig)

=95-70=25

Piglet =95- (puppy+duckling)

=95-55=40

1

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